Carbon Dioxide and the Carbon Cycle

Black carbon can only absorb incoming sunlight, not infrared radiation.

Reducing black carbon emissions has no impact on global warming.

Warming aerosols contribute more to cooling than to warming.

Negative feedbacks in the climate system amplify changes.

Water vapor is not considered a greenhouse gas.

The melting of Arctic sea ice is an example of a negative climate feedback.

Clouds only contribute to cooling by reflecting sunlight.

Black carbon cannot be deposited on snow and ice.

Landfills use MSW ash to make concrete blocks and bricks.

Methane is the primary greenhouse gas contributing to recent climate change.

Biogas mainly consists of carbon dioxide.

Producing electricity from biogas contributes to meeting state renewable portfolio standards.

Carbon dioxide enters the atmosphere only through burning fossil fuels.

Burning methane for electricity generation results in an increase in CO2 emissions.

Carbon dioxide is not naturally absorbed and emitted as part of the carbon cycle.

The carbon cycle only involves the movement of carbon from the earth to the atmosphere.

Biofuels do not have any effects on the environment.

Burning fossil fuels does not disturb the carbon cycle.

The EPA tests ash from waste-to-energy plants to ensure it contains hazardous chemicals.

Biogas is formed as a result of non-biological processes.

The carbon cycle ensures there is an unchanging concentration of carbon in all reservoirs on the planet.

Electricity generated from burning biogas cannot replace fossil fuel-based electricity generation.

Volcanic eruptions do not naturally release carbon back into the atmosphere.

Only human activities produce methane, and there are no natural sources.

Rice cultivation produces methane through a process called 'aerobic digestion'.

Nitrous oxide is produced when synthetic nitrogen fertilizers are applied to soils used for agricultural purposes.

Livestock and manure contribute around 10% to greenhouse gas emissions globally.

Eating less beef and lamb can help reduce the carbon footprint associated with your diet.

Methane and nitrous oxide emissions can occur from the decomposition of animal manures under high oxygen conditions.

Rice, as a staple crop for billions of people globally, accounts for approximately half of the world's supply of calories.

Enteric fermentation in animals like cattle and sheep produces methane as a by-product.

Anaerobic digestion in waterlogged rice fields converts organic matter in the soil to carbon dioxide.

Fuel ethanol contains additives to make it drinkable.

Pure biofuels produce more emissions of particulates than their fossil-fuel derived counterparts.

Biofuel-petroleum blends result in higher emissions compared to fuels without biofuels.

Biodiesel combustion may result in lower amounts of nitrogen oxides relative to petroleum diesel.

Ethanol-gasoline mixtures have lower octane levels than gasoline without ethanol.

Evaporative emissions from fuel tanks and dispensing equipment do not contribute to harmful ground-level ozone and smog.

Gasoline requires no extra processing to reduce evaporative emissions before blending with ethanol.

CO2 emissions from biofuel combustion are included in national greenhouse gas inventories according to international convention.