Global Sustainable Energy

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Questions and Answers

Who is the largest corporate buyer of renewable power?

Google

Google believes that investing in renewable energy is also a __________ __________.

Business Opportunity

Google has the set goal to power the company with what percentage of renewable energy?

100%

What percent of global sustainable energy comes from hydropower?

<p>57%</p> Signup and view all the answers

What percent of global sustainable energy comes from biomass?

<p>23%</p> Signup and view all the answers

What is the term for energy contained in firewood and other plant matter?

<p>Bioenergy/ Biomass energy</p> Signup and view all the answers

Biomass fuels are derived from what type of energy?

<p>Solar energy</p> Signup and view all the answers

What are examples of traditional fuels?

<p>wood, charcoal, and animal dung</p> Signup and view all the answers

What main energy sources are not directly related to the sun?

<p>Nuclear and geothermal</p> Signup and view all the answers

Fossil fuels take _____ out of coal, oil, and natural gas deposits.

<p>Carbon</p> Signup and view all the answers

What is CO2 primarily used for in the context of biofuel production mentioned?

<p>To make ethanol</p> Signup and view all the answers

Where does the CO2 used in ethanol production ultimately come from?

<p>It comes from the air</p> Signup and view all the answers

Why does burning ethanol ideally not increase the net amount of CO2 in the air?

<p>CO2 already comes from the air to make ethanol, so it is just being recycled</p> Signup and view all the answers

What ethical concerns are there with using corn and other food crops to make fuel?

<p>Increased food scarcity and impacts on supply and demand (driving up food prices).</p> Signup and view all the answers

All of the following are advantages to Cellulosic ethanol except?

<p>not produced large-scale (D)</p> Signup and view all the answers

What are some disadvantages of cellulosic ethanol production?

<p>It is not yet produced large-scale, lacks subsidies available to other biofuels, and uses enzymes in processing that can be expensive.</p> Signup and view all the answers

What organism are people turning to as a promising source for biofuel?

<p>Algae</p> Signup and view all the answers

What are the advantages of using algae as a biofuel?

<p>It grows quickly, and because algae lack roots and complex structures, more of their photosynthetic processes go into producing oil.</p> Signup and view all the answers

What solution did NASA come up with for fuel production using algae?

<p>Ocean-grown biofuel</p> Signup and view all the answers

What is the first step of the Ocean-grown biofuel solution proposed by NASA?

<p>Filling semi-permeable bags with wastewater and freshwater algae.</p> Signup and view all the answers

What is the second step of the Ocean-grown biofuel solution proposed by NASA?

<p>Bags allow freshwater to flow out (osmosis) and prevent saltwater from entering and killing algae.</p> Signup and view all the answers

What are some advantages of biofuels?

<p>Can be carbon neutral, lower NO and SO emissions compared to fossil fuels, abundant, widely distributed, and can be produced domestically.</p> Signup and view all the answers

What are some disadvantages or concerns associated with biofuels?

<p>Questions about true carbon neutrality (considering land use changes), costs associated with transport, processing, fertilizers, water, etc., and questions about the net energy gain.</p> Signup and view all the answers

What renewable energy source uses blades that work like airplane wings to turn a generator?

<p>Wind energy</p> Signup and view all the answers

What causes the uneven heating of the Earth's surface?

<p>Differences in geography and topography.</p> Signup and view all the answers

What natural phenomenon forms winds?

<p>Air moving from high-pressure areas to low-pressure areas.</p> Signup and view all the answers

Approximately what percent of electricity comes from wind power in Denmark?

<p>60%</p> Signup and view all the answers

Which countries are among the largest manufacturers of wind turbines?

<p>China and Denmark</p> Signup and view all the answers

Why might different graphs comparing wind energy usage across countries show differing statistics or rankings?

<p>The perspectives are different. For example, one graph might show total energy produced, while another shows the percentage of national consumption met by wind. The US produces a lot of wind energy but also uses a lot of total energy.</p> Signup and view all the answers

Which states utilize approximately two-thirds of the wind power generated in the US?

<p>Texas, California, Iowa, Minnesota, and Washington</p> Signup and view all the answers

Clusters of wind turbines are called _____ _____

<p>Wind farms</p> Signup and view all the answers

What is the fastest growing renewable energy sector?

<p>Wind power</p> Signup and view all the answers

Wind produces about what percentage of global electricity needs?

<p>7%</p> Signup and view all the answers

What are some advantages of wind power?

<p>No fuel needed (wind is free), no pollutants released during operation, domestic energy source, not subject to disruptions of single large energy plants.</p> Signup and view all the answers

What is defined as capturing the energy of water moving under the force of gravity?

<p>Hydropower</p> Signup and view all the answers

What are the two main types of technology used for hydropower?

<p>Impoundment plants (Dams) and Run-of-River plants</p> Signup and view all the answers

Why are run-of-river hydropower plants sometimes preferred?

<p>They are less costly, generally less ecologically disruptive than large dams, but are dependent on sustained river flow.</p> Signup and view all the answers

Hydropower accounts for approximately what percent of global demand for electricity?

<p>16%</p> Signup and view all the answers

Hydropower accounts for approximately what percent of US demand for electricity?

<p>6%</p> Signup and view all the answers

What countries are the largest producers of hydropower?

<p>China, Brazil, and Canada</p> Signup and view all the answers

What two countries rely on hydropower for almost 100% of their electricity needs?

<p>Norway and Paraguay</p> Signup and view all the answers

What structure significantly altered the seasonal flow of the Colorado River?

<p>Glen Canyon Dam</p> Signup and view all the answers

All of the following are advantages of hydropower except...?

<p>plants gain water (D)</p> Signup and view all the answers

What was the name of the solar-powered plane that completed a record-setting journey from California to New York City?

<p>The Solar Impulse</p> Signup and view all the answers

What solution allowed the Solar Impulse to fly at night?

<p>Storing excess solar energy collected during the day in batteries.</p> Signup and view all the answers

Approximately how long did each flight leg take for the Solar Impulse during its US journey?

<p>Approximately 20 hours</p> Signup and view all the answers

When did the Solar Impulse achieve its goal of flying from California to New York?

<p>July 6, 2013</p> Signup and view all the answers

Zion National Park in Utah is heated almost entirely by what type of renewable energy?

<p>Solar</p> Signup and view all the answers

What are the two specialized silicon layers within a typical photovoltaic (PV) cell?

<p>Silicon layer doped with phosphorus (n-type) and Silicon layer doped with boron (p-type).</p> Signup and view all the answers

What is a Photovoltaic (PV) Cell?

<p>A device that converts solar energy directly into electricity.</p> Signup and view all the answers

What is Concentrating Solar Power (CSP)?

<p>A technology that uses mirrors or lenses to concentrate solar energy onto a receiver (often containing water or another fluid), producing steam or heat to turn generator turbines.</p> Signup and view all the answers

Where does solar power have the most potential for large-scale generation in the US?

<p>The southwest states</p> Signup and view all the answers

What are the World Solar Challenge Races?

<p>Competitive races featuring electric vehicles powered entirely by solar energy obtained from solar panels on the surface of the cars.</p> Signup and view all the answers

All of the following are disadvantages of Solar power except...?

<p>Most expensive form of energy (C)</p> Signup and view all the answers

What is defined as heat energy generated and stored within the Earth, not originating from the Sun?

<p>Geothermal Energy</p> Signup and view all the answers

What is a dry-steam geothermal power plant?

<p>A type of geothermal plant where underground hot steam is piped directly from reservoirs to turn generator turbines.</p> Signup and view all the answers

What are ground source heat pumps (GSHPs) primarily used for?

<p>Heating and cooling buildings.</p> Signup and view all the answers

Where is the highest concentration of ground-source heat pumps found in the US?

<p>Primarily in the Western states.</p> Signup and view all the answers

True or False: Geothermal energy disadvantages include that they are reliable and inexpensive, pollution free, and ground-source heat pumps use 30-70% less energy than conventional methods.

<p>False (B)</p> Signup and view all the answers

All of the following are disadvantages of Geothermal energy except...?

<p>free heat (fuel source) (C)</p> Signup and view all the answers

What forms of ocean movement can be harnessed for energy?

<p>Kinetic energy from currents, tides, and waves.</p> Signup and view all the answers

What structure in La Rance, France, uses tidal movement to spin turbines and generate electricity?

<p>A tidal barrage</p> Signup and view all the answers

What technology generates 1.2 megawatts of renewable energy using tidal flows in Northern Ireland?

<p>A tidal turbine (specifically, the SeaGen turbine in Strangford Lough was a prominent example).</p> Signup and view all the answers

What are the advantages of ocean energy?

<p>It is renewable and generally pollution-free during operation. Once installed, production costs can be relatively low.</p> Signup and view all the answers

In energy economics, any cost of conserved energy (energy efficiency measure) that falls under the current energy price line is considered what?

<p>Cost effective</p> Signup and view all the answers

What term describes problems that are large, complex, and difficult to solve due to interconnected factors and incomplete knowledge?

<p>Wicked problems</p> Signup and view all the answers

We have had more species now than ever before, but we are also __________ species __________.

<p>losing; faster</p> Signup and view all the answers

What is meant by variations in the genes among individuals of the same species?

<p>Genetic diversity</p> Signup and view all the answers

How is biodiversity measured within populations?

<p>By genetic diversity</p> Signup and view all the answers

What does genetic diversity improve?

<p>The survival potential of populations, especially when facing changing environmental conditions.</p> Signup and view all the answers

What type of breeding behavior maximizes genetic diversity?

<p>Outbreeding (sexual reproduction between non-related individuals).</p> Signup and view all the answers

What type of breeding increases the chances of offspring inheriting harmful recessive genetic diseases?

<p>Inbreeding (sexual reproduction between closely related individuals).</p> Signup and view all the answers

What is defined as the variety of species present in an area, including both the number of different species and their relative abundance?

<p>Species diversity</p> Signup and view all the answers

Organisms that are found only in specific, restricted geographic localities are called what?

<p>Endemic species</p> Signup and view all the answers

What is meant by the variety of habitats, niches, trophic levels, and community interactions within an ecosystem?

<p>Ecological diversity</p> Signup and view all the answers

What does ecological diversity often include?

<p>The structural complexity of a habitat.</p> Signup and view all the answers

What are the three main levels at which biodiversity is measured?

<p>Genetic diversity, species diversity, and ecological diversity.</p> Signup and view all the answers

What taxonomic group accounts for the largest portion of known global biodiversity?

<p>Insects</p> Signup and view all the answers

We know about __ million species of insects and estimate there are potentially __ million total species.

<p>1; 5</p> Signup and view all the answers

Which taxonomic group accounts for most described global biodiversity?

<p>Insects</p> Signup and view all the answers

Lines showing equal levels of species richness (isoclines) on a map generally indicate that species richness increases as you move towards what?

<p>The equator</p> Signup and view all the answers

In what global regions are there dramatic increases in biodiversity?

<p>Tropical areas</p> Signup and view all the answers

What are two general explanations for high tropical biodiversity?

<ol> <li>Diversity increases over time without limit (more time for speciation). 2) Equilibrium models suggesting factors adding species (like speciation) occur faster or factors removing species (like extinction) occur slower in the tropics.</li> </ol> Signup and view all the answers

What are biodiversity hotspots?

<p>Regions characterized by having a high concentration of endemic species (species found nowhere else) and experiencing significant habitat loss.</p> Signup and view all the answers

What are two different spatial scales at which diversity can be measured?

<p>Local diversity (alpha diversity) and regional diversity (gamma diversity).</p> Signup and view all the answers

What is local diversity (or alpha diversity)?

<p>The number of species found within a small, relatively uniform area or habitat.</p> Signup and view all the answers

What is regional diversity (or gamma diversity)?

<p>The total number of species observed across all habitats within a larger, barrier-free geographic area.</p> Signup and view all the answers

What is the MacArthur-Wilson Equilibrium Model for Island Biogeography?

<p>A foundational ecological model that proposes the number of species on an island (or isolated habitat patch) is determined by a dynamic balance between the rate of immigration of new species and the rate of extinction of existing species.</p> Signup and view all the answers

According to the MacArthur-Wilson model, what determines the equilibrium number of species on an island?

<p>The balance point where the rate of species immigration equals the rate of species extinction.</p> Signup and view all the answers

What does the MacArthur-Wilson Equilibrium Model for Island Biogeography generally predict about island biodiversity?

<p>Large islands located near a mainland (source of immigrants) will tend to have higher biodiversity (more species) than small islands located farther away from the mainland.</p> Signup and view all the answers

More than 99% of all species that have ever lived on Earth have gone __________.

<p>extinct</p> Signup and view all the answers

Why is extinction considered a 'normal' process in the long term?

<p>Because of evolution; species arise, persist for a time, and eventually disappear as environments change and new species evolve.</p> Signup and view all the answers

What facilitated the overhunting that led to the extinction of passenger pigeons?

<p>The expansion of railroads in the 1850s, which provided easier access to nesting grounds and transport of hunted birds to markets.</p> Signup and view all the answers

In what year did the last passenger pigeon, known as 'Martha', die in captivity?

<p>1914</p> Signup and view all the answers

Google believes that investing in renewable energy is also a _____ _____.

<p>Business Opportunity</p> Signup and view all the answers

What term describes energy contained in firewood and other plant matter?

<p>Bioenergy/ Biomass energy</p> Signup and view all the answers

Fossil fuels take what element out of long-term storage in coal, oil, and natural gas deposits?

<p>Carbon</p> Signup and view all the answers

In the context of biofuel production (like ethanol), what is CO2 used for?

<p>To make ethanol (indirectly, via photosynthesis by the source crop)</p> Signup and view all the answers

Where does the CO2 absorbed by plants used for ethanol production come from?

<p>It comes from the air</p> Signup and view all the answers

Why is burning ethanol considered potentially carbon-neutral in a simplified view?

<p>CO2 already comes from the air to make ethanol (via plant growth), so burning it releases CO2 that was recently absorbed, effectively recycling it.</p> Signup and view all the answers

Difficulties with large-scale production, lack of subsidies compared to corn ethanol, and expensive processing enzymes are considered what for cellulosic ethanol?

<p>Disadvantages</p> Signup and view all the answers

What type of organism are people exploring as a potentially highly efficient biofuel source?

<p>Algae</p> Signup and view all the answers

What are advantages of algae as a biofuel source?

<p>It grows quickly, and since algae lack roots and complex structures, photosynthetic energy is primarily directed towards producing oil-rich biomass.</p> Signup and view all the answers

What innovative biofuel solution involving ocean-grown algae did NASA explore?

<p>Ocean-grown biofuel using semi-permeable bags</p> Signup and view all the answers

What is the first step of the proposed Ocean-grown biofuel solution by NASA?

<p>Filling semi-permeable bags with wastewater and freshwater algae.</p> Signup and view all the answers

What is the second step of the proposed Ocean-grown biofuel solution by NASA?

<p>Bags allow freshwater (generated by algae) to flow out, preventing saltwater intrusion that would kill the freshwater algae.</p> Signup and view all the answers

What are some potential advantages of biofuels?

<p>Can be carbon neutral (depending on source/lifecycle), potentially lower NO and SO emissions than fossil fuels, derived from abundant/widely distributed resources, can be produced domestically.</p> Signup and view all the answers

What are some potential disadvantages or concerns related to biofuels?

<p>Questions about true carbon neutrality (lifecycle emissions), costs (transport, processing, inputs like fertilizers/water), net energy gain (energy returned vs. energy invested), food vs. fuel debate.</p> Signup and view all the answers

What energy source uses blades that function like airplane wings to turn a generator?

<p>Wind energy</p> Signup and view all the answers

What atmospheric phenomenon, driven by uneven heating, forms winds?

<p>Differences in air pressure (High-Low pressure systems)</p> Signup and view all the answers

In Denmark, approximately what percent of electricity comes from wind power?

<p>Around 60% (Note: This figure fluctuates, but Denmark has one of the highest percentages globally).</p> Signup and view all the answers

Why might US wind energy statistics differ depending on whether you look at total production versus percentage of national energy use?

<p>The perspectives are different. The US produces a large absolute amount of wind energy (high total production) but because its overall energy consumption is vast, wind power still represents a smaller percentage of the total national energy mix compared to some smaller countries.</p> Signup and view all the answers

Which states account for a significant portion (around 2/3rds historically) of wind power generation in the US?

<p>Texas, Iowa, Oklahoma, Kansas, California, Illinois (Note: Rankings change, but these are consistently major producers). The specific states listed in the source were Texas, California, Iowa, Minnesota, and Washington.</p> Signup and view all the answers

Clusters of wind turbines are called what?

<p>Wind farms</p> Signup and view all the answers

What is the fastest growing renewable energy sector globally?

<p>Wind power (Historically, Solar PV has also seen rapid growth; context matters)</p> Signup and view all the answers

Wind power produces approximately what percentage of global electricity needs?

<p>Around 7%</p> Signup and view all the answers

What term describes capturing the energy of water moving under the force of gravity?

<p>Hydropower</p> Signup and view all the answers

Why are run-of-river hydropower plants often preferred?

<p>They are generally less costly, less ecologically disruptive than large dams, but are dependent on consistent river flow.</p> Signup and view all the answers

Hydropower accounts for approximately what percent of global electricity demand?

<p>Around 16%</p> Signup and view all the answers

Hydropower accounts for approximately what percent of US electricity demand?

<p>Around 6%</p> Signup and view all the answers

What structure significantly altered the natural seasonal flow of the Colorado River?

<p>Glen Canyon Dam</p> Signup and view all the answers

What technological solution allowed the Solar Impulse to fly at night?

<p>Storing excess solar energy collected during the day in batteries.</p> Signup and view all the answers

Approximately how long did the individual flight legs take for the Solar Impulse during its cross-US journey?

<p>Approximately 20 hours</p> Signup and view all the answers

Zion National Park in Utah utilizes what type of energy to heat its visitor center and other facilities almost entirely?

<p>Solar energy (specifically, passive solar design and potentially solar thermal)</p> Signup and view all the answers

What are the two specially treated silicon layers typically found in a photovoltaic (PV) cell?

<p>A silicon layer doped with phosphorus (n-type) and a silicon layer doped with boron (p-type).</p> Signup and view all the answers

What is the primary function of a photovoltaic (PV) cell?

<p>To convert sunlight directly into electricity.</p> Signup and view all the answers

Where in the US does solar power have the greatest potential due to high solar irradiance?

<p>The Southwest states (e.g., California, Arizona, Nevada, New Mexico).</p> Signup and view all the answers

What term describes heat energy generated and stored within the Earth, not originating from the Sun?

<p>Geothermal Energy</p> Signup and view all the answers

How does a dry-steam geothermal power plant generate electricity?

<p>It directly uses underground steam piped from geothermal reservoirs to turn generator turbines.</p> Signup and view all the answers

In which region of the US are most large-scale geothermal power plants located?

<p>Western states</p> Signup and view all the answers

All of the following are potential disadvantages of Geothermal energy except...?

<p>Fuel (heat) is free (D)</p> Signup and view all the answers

What category of renewable energy utilizes the kinetic energy of moving water in tides and waves?

<p>Ocean energy (or Marine energy)</p> Signup and view all the answers

What type of structure, like the one at La Rance, France, uses gates and turbines to generate electricity as water moves in and out of an estuary or bay with the tides?

<p>A tidal barrage</p> Signup and view all the answers

What device, exemplified by one in Northern Ireland, generates renewable energy using underwater currents, particularly tidal streams?

<p>A tidal turbine</p> Signup and view all the answers

What are the primary advantages of ocean energy (tidal and wave)?

<p>It is renewable, pollution-free during operation, and tides are highly predictable. Energy production can be relatively consistent (especially tides).</p> Signup and view all the answers

What are the main disadvantages or challenges of ocean energy?

<p>Potential ecosystem disturbance (especially barrages), high costs for installation and maintenance in harsh marine environments, requirement for specific site conditions (high tidal range for barrages, strong waves/currents), geographic limitations.</p> Signup and view all the answers

In energy economics, any cost of conserved energy (energy efficiency measure) that falls below the price line of the current energy source is considered what?

<p>Cost-effective</p> Signup and view all the answers

What term describes problems that are large, complex, and difficult to solve due to incomplete, contradictory, or changing requirements, often involving many stakeholders with different values?

<p>Wicked problems</p> Signup and view all the answers

Earth has more species diversity now than ever before in its history, but we are also _____ species _____ than historical background rates.

<p>losing; faster</p> Signup and view all the answers

What term describes the variations in genes among individuals of the same species?

<p>Genetic diversity</p> Signup and view all the answers

Within populations, how is biodiversity often measured at its most fundamental level?

<p>By genetic diversity</p> Signup and view all the answers

What aspect of population survival does genetic diversity improve, especially in changing environments?

<p>The survival and adaptability of populations.</p> Signup and view all the answers

What reproductive strategy tends to maximize genetic diversity within a population?

<p>Outbreeding (sexual reproduction with non-related individuals)</p> Signup and view all the answers

What reproductive strategy increases the chances of offspring inheriting harmful recessive genetic diseases like hemophilia or cystic fibrosis?

<p>Inbreeding (sexual reproduction between closely related individuals)</p> Signup and view all the answers

What term is defined as the variety of species present in an area, encompassing both the number of different species and their relative abundance?

<p>Species diversity</p> Signup and view all the answers

What are organisms called that are found only in specific, often geographically isolated, localities?

<p>Endemic species</p> Signup and view all the answers

What term refers to the variety of habitats, ecological niches, trophic levels, and community interactions within an ecosystem?

<p>Ecological diversity (or Ecosystem diversity)</p> Signup and view all the answers

What aspect of a habitat contributes significantly to ecological diversity?

<p>The structural complexity of the habitat</p> Signup and view all the answers

Which major taxonomic group of organisms accounts for the largest portion of known global biodiversity?

<p>Insects</p> Signup and view all the answers

We know about approximately _____ million species of insects, and scientists estimate there might be _____ million species in total.

<p>1; 5 (or higher, estimates vary widely)</p> Signup and view all the answers

Which taxonomic group accounts for the majority of described species and estimated total global biodiversity?

<p>Insects</p> Signup and view all the answers

Maps showing lines of equal species richness (isoclines) generally indicate that species richness increases as you move towards what geographical latitude?

<p>The equator</p> Signup and view all the answers

In what geographical areas are the most dramatic increases in biodiversity typically observed?

<p>Tropical areas</p> Signup and view all the answers

What are two main hypotheses attempting to explain high tropical biodiversity?

<ol> <li>The 'time hypothesis': Biodiversity increases steadily over time, and tropical regions have been climatically stable longer, allowing more time for speciation. 2) The 'equilibrium hypothesis': Factors adding species (like speciation rates) occur faster or factors removing species (like extinction rates) occur slower in the tropics, leading to a higher equilibrium number of species.</li> </ol> Signup and view all the answers

Biodiversity can be measured at different spatial scales. What are two common scales mentioned?

<p>Local diversity (alpha diversity) and regional diversity (gamma diversity)</p> Signup and view all the answers

What ecological model compares immigration and extinction rates as a function of habitat patch size and isolation to predict species richness?

<p>The MacArthur-Wilson Equilibrium Model for Island Biogeography</p> Signup and view all the answers

According to the MacArthur-Wilson model, what determines the number of species eventually found on an island?

<p>The dynamic balance (equilibrium point) between the rate at which new species immigrate to the island and the rate at which existing species go extinct on the island.</p> Signup and view all the answers

What does the MacArthur-Wilson Equilibrium Model for Island Biogeography predict regarding island size and distance from the mainland?

<p>It predicts that large islands near a mainland source pool will have higher equilibrium biodiversity (more species) than small islands farther away from the mainland.</p> Signup and view all the answers

It is estimated that more than 99% of all species that have ever lived on Earth have gone _____

<p>Extinct</p> Signup and view all the answers

Why is extinction considered a 'normal' or natural process over geological timescales?

<p>Because of evolution and environmental change; species arise, persist for a time, and are eventually replaced or disappear as conditions change or new, better-adapted species evolve.</p> Signup and view all the answers

What factor, facilitated by the expansion of railroads in the 1850s, led to the extinction of the passenger pigeon?

<p>Intense, large-scale commercial hunting.</p> Signup and view all the answers

In what year did 'Martha', the last known passenger pigeon, die in captivity at the Cincinnati Zoo?

<p>1914</p> Signup and view all the answers

Fossil fuels take what out of coal, oil, and natural gas deposits?

<p>Carbon</p> Signup and view all the answers

What is CO2 used for in the context of ethanol production?

<p>To make ethanol</p> Signup and view all the answers

Where does the CO2 used by plants to make ethanol ultimately come from?

<p>It comes from the air</p> Signup and view all the answers

What are some disadvantages of cellulosic ethanol?

<p>Cellulosic ethanol is not produced large-scale, has no subsidy available, and enzymes used in processing are expensive.</p> Signup and view all the answers

What organism are people turning to as a potential source of biofuel?

<p>Algae</p> Signup and view all the answers

What are advantages of algae as a biofuel?

<p>It grows quick, all photosynthetic processes go into producing oil because they do not have roots</p> Signup and view all the answers

What solution did NASA come up with for fuel production involving algae?

<p>Ocean-grown biofuel</p> Signup and view all the answers

What are some potential disadvantages or concerns regarding biofuels?

<p>Questions about carbon neutrality, Costs associated with transport, processing, fertilizers, water, etc., Questions about net energy gain</p> Signup and view all the answers

What energy source uses a blade that works like an airplane wing and turns a generator?

<p>Wind energy</p> Signup and view all the answers

What causes uneven heating of the Earth?

<p>Geography and topography</p> Signup and view all the answers

What forms winds?

<p>High-Low pressure differences</p> Signup and view all the answers

What percent of electricity comes from wind power in Denmark?

<p>Approximately 60%</p> Signup and view all the answers

Which countries are some of the largest manufacturers of wind turbines?

<p>China and Denmark</p> Signup and view all the answers

Why might different graphs show differing statistics about wind power production versus consumption percentages?

<p>The perspectives are different. The US produces a lot of energy but we use a lot of it.</p> Signup and view all the answers

Which states generate about two-thirds of the wind power in the US?

<p>Texas, California, Iowa, Minnesota, and Washington</p> Signup and view all the answers

Hydropower accounts for what percent of global demand for electricity?

<p>Approximately 16%</p> Signup and view all the answers

Hydropower accounts for what percent of US demand for electricity?

<p>Approximately 6%</p> Signup and view all the answers

What two countries use hydropower for almost 100% of their electricity needs?

<p>Norway and Paraguay</p> Signup and view all the answers

What major infrastructure project altered the seasonal flow of the Colorado river?

<p>Glen Canyon Dam</p> Signup and view all the answers

What is the solar-powered plane that finished a record-setting journey from California to New York City?

<p>The Solar Impulse</p> Signup and view all the answers

What solution was implemented for the Solar Impulse so it could fly at night?

<p>Store the solar energy in batteries</p> Signup and view all the answers

How long did the flight legs typically take for the Solar Impulse cross-country journey?

<p>approximately 20 hours</p> Signup and view all the answers

When did the Solar Impulse reach its goal of flying from California to NY?

<p>July 6, 2013</p> Signup and view all the answers

Zion National Park in Utah utilizes what type of energy extensively for heating?

<p>Solar</p> Signup and view all the answers

What are the two specialized silicon layers in a typical photovoltaic cell?

<p>Silicon layer with phosphorus and Silicon layer with boron</p> Signup and view all the answers

What is a Photovoltaic (PV) Cell primarily used for?

<p>To convert solar energy directly into electricity.</p> Signup and view all the answers

Where does solar power have the most potential in the US?

<p>The southwest states</p> Signup and view all the answers

What is defined as heat energy generated and stored in Earth, not originating from the Sun?

<p>Geothermal Energy</p> Signup and view all the answers

Where is the highest concentration of ground-source heat pump installations in the US?

<p>Western states</p> Signup and view all the answers

What type of energy harnesses the kinetic energy of tides and waves?

<p>Ocean energy</p> Signup and view all the answers

What structure spins turbines and generates electricity as water moves in and out of the bay in La Rance, France?

<p>The tidal barrage</p> Signup and view all the answers

What generates 1.2 megawatts of renewable energy in Strangford Lough, Northern Ireland?

<p>A tidal turbine (SeaGen)</p> Signup and view all the answers

In energy economics, any cost of conserved energy under the current energy price line is considered?

<p>Cost effective</p> Signup and view all the answers

What term describes problems that are large, complex, and difficult to solve due to interconnectedness and multiple stakeholders?

<p>Wicked problems</p> Signup and view all the answers

We have had more species now than ever before, but we are also _____ species _____.

<p>Losing; Faster</p> Signup and view all the answers

What type of breeding maximizes genetic diversity?

<p>Outbreeding (sexual reproduction with non-related individuals)</p> Signup and view all the answers

What type of breeding increases the chances of genetic diseases like hemophilia, cystic fibrosis, etc.?

<p>Inbreeding (sexual reproduction with related individuals)</p> Signup and view all the answers

Organisms that are found only in specific localities are called?

<p>Endemic species</p> Signup and view all the answers

What is meant by the variety of habitats, niches, trophic levels, and community interactions?

<p>Ecological diversity (or ecosystem diversity)</p> Signup and view all the answers

What does ecological diversity include?

<p>The structural complexity of a habitat</p> Signup and view all the answers

What group accounts for most described global biodiversity?

<p>Insects</p> Signup and view all the answers

We know about _____ million species of insects and estimate there are _____ million total.

<p>1; 5</p> Signup and view all the answers

Which taxonomic group accounts for most global biodiversity?

<p>Insects</p> Signup and view all the answers

Isoclines on global biodiversity maps indicate species richness generally increases towards what geographical feature?

<p>The equator</p> Signup and view all the answers

There are dramatic increases in biodiversity in what global regions?

<p>Tropical areas</p> Signup and view all the answers

Diversity can be measured at a variety of spatial levels including?

<p>Local diversity (alpha diversity) and regional diversity (gamma diversity)</p> Signup and view all the answers

According to island biogeography theory, what determines the number of species on an island?

<p>The balance between rates of immigration and extinction.</p> Signup and view all the answers

The MacArthur-Wilson Equilibrium Model for Island Biogeography predicts...

<p>Large islands near a mainland will have higher biodiversity than small islands farther away.</p> Signup and view all the answers

More than 99% of all species that have lived on Earth have gone _____.

<p>Extinct</p> Signup and view all the answers

Why is extinction considered a 'normal' process over geological time?

<p>Because of evolution and changing environmental conditions.</p> Signup and view all the answers

What major factor led to the extinction of passenger pigeons?

<p>Overhunting facilitated by the expansion of railroads in the 1850s.</p> Signup and view all the answers

The last passenger pigeon, named 'Martha', died in captivity in what year?

<p>1914</p> Signup and view all the answers

Flashcards

Largest corporate buyer of renewable power?

Google.

Renewable energy investment benefits?

Business Opportunity.

Google's renewable energy goal?

100%.

Global sustainable energy from hydropower?

57%.

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Global sustainable energy from biomass?

23%.

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Bioenergy/Biomass energy

Energy contained in firewood and other plant matter.

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Biomass fuels are derived from what energy?

Solar energy.

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Examples of traditional fuels?

Wood, charcoal, and animal dung.

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Main energy sources not from the sun?

Nuclear and geothermal.

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Fossil fuels extract what?

Carbon.

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What is CO2 used for?

To make ethanol.

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Where does CO2 come from?

It comes from the air.

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Why no net CO2 increase from burning ethanol?

CO2 already comes from the air to make ethanol, so it is just being recycled.

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Ethical concerns of using food for fuel?

Increased scarcity and supply and demand.

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All are advantages of Cellulosic ethanol except?

D

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Cellulosic ethanol problems?

Disadvantages

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Biofuel alternative?

Algae.

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Advantages of algae as biofuel?

It grows quick, all photosynthetic processes go into producing oil because they do not have roots

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NASA's fuel solution?

Ocean-grown biofuel.

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Ocean biofuel NASA step 1?

Filling semi-permeable bags with wastewater and freshwater algae.

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Ocean biofuel NASA step 2?

Bags allow freshwater to flow out of the bag and prevent saltwater from entering and killing algae.

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Ocean biofuel NASA step 3?

Algae feed on the base and grow fatty, lipid cells.

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Ocean biofuel NASA step 4?

Fatty cells are rich in oil to be used as fuel.

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Biofuel advantages?

Carbon neutral, lower NO and SO, abundant, widely distributed, produced domestically.

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Biofuel disadvantages?

Questions about carbon neutrality, costs associated with transport, processing, fertilizers, water, etc., questions about net gain.

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Airplane wing spinning a generator?

Wind energy.

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Uneven heating of Earth is caused by?

Geography and topography.

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Winds are formed by?

High-Low pressure.

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Denmark electricity from wind?

60%.

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Wind turbine manufacturers?

China and Denmark.

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Why do the two graphs show differing statistics?

The perspectives are different. The US produces a lot of energy but we use a lot of it.

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States using 2/3rds of wind power in the US?

Texas, California, Iowa, Minnesota, and Washington.

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Clusters of Turbines are called?

Wind farms.

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Fastest growing renewable sector?

Wind power.

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Wind produces about what percentage of global electricity needs?

7%

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Advantages of wind power?

No fuel needed, No pollutants released, Domestic energy source, Not subject to disruptions of single energy plants.

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Disadvantages of wind power?

Bird and Bat deaths, Aesthetics, Intermittent wind, Windy areas are not usually near urban areas.

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Hydropower is defined as?

Capturing the energy of water moving under the force of gravity.

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Two types of hydropower tech?

Impoundment plants (Dams) and Run-of-River plants.

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Why use run-of-river plants?

They are less costly, less ecologically disruptive, and dependent on sustained flow

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Hydropower accounts for what percent of global demand of electricity?

16%

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Hydropower accounts for what percent of US demand of electricity?

6%

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Largest producers of hydropower?

China, Brazil, and Canada.

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Hydropower for almost 100%?

Norway and Paraguay.

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What altered the flow of the Colorado river?

Glen Canyon Dam

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All are advantages of hydropower except?

C

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All are disadvantages of hydropower except...?

D

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Solar-powered plane to NYC?

The Solar Impulse

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Solar Impulse Fly at night?

Store the solar energy in batteries

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How long did Flight legs take for the Solar Impulse?

Approximately 20 hours

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Study Notes

  • Google is the largest corporate buyer of renewable power, viewing it as a business opportunity.
  • The company aims to power itself with 100% renewable energy.

Global Sustainable Energy

  • Hydropower accounts for 57% of global sustainable energy.
  • Biomass accounts for 23% of global sustainable energy.

Bioenergy/Biomass Energy

  • This refers to the energy contained in firewood and other plant matter.
  • Biomass fuels harness solar energy.
  • Traditional fuels include wood, charcoal, and animal dung.
  • Nuclear and geothermal energy sources aren't directly sun-related.

Fossil Fuels

  • These extract carbon from coal, oil, and natural gas deposits.

CO2 and Ethanol

  • CO2 from the air is used to make ethanol.
  • Burning ethanol doesn't increase atmospheric CO2, as the carbon is recycled from the air.

Ethical concerns with corn and other food for fuel

  • Making fuel from food carries ethical concerns due to increased scarcity and supply/demand issues.

Cellulosic Ethanol

  • Advantages include being native, needing little fertilizer or water, growing on marginal land, and being perennial.
  • Disadvantages include not being produced large-scale, lacking subsidies, and having expensive enzymes used in processing.

Algae as Biofuel

  • People are exploring algae as a biofuel source.
  • Advantages include quick growth and photosynthetic processes that focus on oil production.

NASA's Ocean-Grown Biofuel Solution

  • Fill semi-permeable bags with wastewater and freshwater algae.
  • Bags allow freshwater to flow out while preventing saltwater from entering.
  • Algae feed and grow fatty, lipid cells.
  • Fatty cells are rich in oil and can be used as fuel.

Biofuel Advantages

  • Biofuels are carbon neutral, have lower NO and SO emissions, are abundant, widely distributed, and produced domestically.

Biofuel Disadvantages

  • Carbon neutrality is questioned.
  • There are costs linked to transport, processing, fertilizers, and water.
  • The net gain is questioned.

Wind Energy

  • This uses blades that function like airplane wings to turn a generator.
  • Uneven heating of the Earth is caused by geography and topography.
  • High-low pressure systems form winds.
  • Denmark gets 60% of its electricity from wind power.
  • China and Denmark are major wind turbine manufacturers.

US Wind Power

  • Texas, California, Iowa, Minnesota, and Washington use 2/3 of wind power in the US.
  • Clusters of turbines are called wind farms.
  • Wind power is the fastest-growing renewable sector.
  • Wind produces about 7% of global electricity needs.

Wind Power Advantages

  • No fuel is needed.
  • No pollutants are released.
  • Wind is a domestic energy source.
  • Wind is not subject to disruptions of single energy plants.

Wind Power Disadvantages

  • Wind can cause bird and bat deaths.
  • Turbines have aesthetic impacts.
  • Wind is intermittent.
  • Windy areas are not usually near urban areas.

Hydropower

  • This captures energy from water moving under gravity.
  • Two types of technology in use are impoundment plants (dams) and run-of-river plants.
  • Run-of-river plants are less costly, ecologically disruptive, and dependent on sustained flow.

Hydropower Use

  • Hydropower accounts for 16% of global electricity demand.
  • Hydropower accounts for 6% of US electricity demand.
  • China, Brazil, and Canada are the largest producers of hydropower.
  • Norway and Paraguay use hydropower for almost 100% of their electricity needs.

Glen Canyon Dam

  • Glen Canyon Dam altered the seasonal flow of the Colorado River.

Hydropower Advantages

  • Fossil fuels are not needed.
  • No pollutants are emitted.
  • Energy is cheap, and power output can be matched to demand.
  • Dams are used for flood control and water retention.

Hydropower Disadvantages

  • There are negative effects on environments, human communities, and ecosystems (flow changes).
  • Peak flows are no longer seasonal.
  • Sediment accumulation, transport, temperature, and oxygen are all changed.

Solar Impulse

  • The Solar Impulse is a solar-powered plane that completed a record-setting journey from California to New York City.
  • Solar energy was stored in batteries for night flying.
  • Flight legs took approximately 20 hours.
  • The Solar Impulse reached its goal on July 6, 2013.

Solar Energy Application

  • Zion National Park in Utah is heated almost entirely by solar energy.

Photovoltaic Cells

  • The two layers of a photovoltaic cell include a silicon layer with phosphorus and a silicon layer with boron.
  • Photovoltaic cells store or create solar energy.
  • Concentrating solar power (CSP) concentrates solar energy onto water pipes, producing steam to turn generator turbines.
  • The southwestern states have the most solar power potential in the US.

World Solar Challenge Races

  • These are competitive races of electric vehicles powered by solar energy obtained from solar panels on the car surfaces.

Solar Power Advantages

  • Solar power is free and renewable.
  • No emissions are produced.
  • Solar power increases job opportunities.
  • Roof installations/space options exist.

Solar Power Disadvantages

  • There are daylight requirements, geographical limitations and hazardous materials are used in construction.
  • Solar has a high cost of electricity compared to coal.
  • Solar has high start up costs.

Geothermal Energy

  • This is heat energy generated and stored in Earth, not originating from the Sun.
  • Geothermal electricity involves dry-steam power plants where underground hot water and steam generate electricity.
  • Ground source heat pumps are used for heating and cooling.
  • Most ground-source heat pumps in the US are in western states.

Geothermal Energy Advantages

  • Geothermal energy is reliable, inexpensive, and pollution-free.
  • Ground-source heat pumps use 30-70% less energy than conventional methods.

Geothermal Energy Disadvantages

  • Geothermal can cause ecosystem disturbance.
  • There are concerns about replenishment rates of ground heat.
  • Geothermal has high start up costs.
  • Geothermal has geographic limitations.

Ocean Energy

  • This uses kinetic energy, tides, and waves.
  • The tidal barrage in La Rance, France spins turbines and generates electricity as water moves in and out of the bay.
  • A tidal turbine generates 1.2 megawatts of renewable energy in Northern Ireland.

Ocean Energy Advantages

  • Ocean Energy is renewable and pollution free.
  • Ocean Energy production is not very costly.

Ocean Energy Disadvantages

  • Ocean Energy can cause ecosystem disturbance.
  • Tidal barrage systems need high amplitude.
  • Ocean Energy has geographic limitations.

Energy Conservation

  • Any cost of conserved energy under the current energy price line is considered cost-effective.

Wicked Problems

  • Wicked problems are large and complex problems.

Biodiversity Loss

  • Species are currently being lost faster than ever before.

Genetic Diversity

  • This refers to variations in genes among individuals of the same species.
  • Genetic diversity improves the survival of populations in changing environments.
  • Outbreeding maximizes genetic diversity.
  • Inbreeding increases the chances of genetic diseases.

Species Diversity

  • This refers to the variety of species present in an area, including the number of different species and their relative abundance.
  • Endemic species are only found in specific localities.

Ecological Diversity

  • This refers to the variety of habitats, niches, trophic levels, and community interactions.
  • Ecological diversity includes the structural complexity of a habitat.

Measurement of Biodiversity

  • Biodiversity is measured by genetic diversity, species diversity, and ecological diversity.
  • Insects account for most global biodiversity.
  • 1 million species of insects are known, and an estimated 5 million total exist.
  • Isoclines indicate species richness increases towards the equator.
  • There are dramatic increases in biodiversity in tropical areas.
  • High tropical biodiversity occurs because biodiversity increases without limit over time.

Biodiversity Hotspots

  • Biodiversity hotspots are areas with high endemism and diversity.

Spatial Levels of Diversity

  • Diversity can be measured at local diversity and regional diversity spatial levels.
  • Local diversity is the number of species in a small area of homogeneous habitat.
  • Regional diversity is the total number of species observed in all habitats within a barrier-free geographic area.

MacArthur-Wilson Equilibrium Model for Island Biogeography

  • This model compares immigration and extinction rates as a function of patch size and patch isolation.
  • The number of species on an island depends on the balance between immigration and extinction rates.
  • Large islands near a mainland will have higher biodiversity than small islands farther away.

Extinction

  • More than 99% of all species that have lived on Earth are extinct.
  • Extinction is typically "normal" because of evolution.
  • Passenger pigeons went extinct due to easier access to hunting via railroads in the 1850s.
  • The last passenger pigeon "Martha" died in captivity in 1914.

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