Week 7: Human Population Growth Impact

Increased human population negatively affects the environment by straining resources, causing unrest, degrading natural resources, and leading to pollution and extinction

Population growth, affluence (wealth), and technology use directly correlate with the environment's impact.

Increased human population and consumption contribute to water pollution due to waste disposal.

Poor utilization of resources leads to the deterioration of the environment.

Population size, wealth, and technology usage directly influence the environment's impact.

Rapid population growth can outpace food production, potentially leading to widespread hunger.

Limited resources like jobs and food in areas with growing populations can lead to conflict.

Strategies to lessen the negative environmental effects of human population growth are needed.

Water is essential for all organisms to survive. It's crucial for plant photosynthesis, which creates organic matter that fuels other life forms. Water also serves as a solvent and heat transfer agent.

Potable water is safe and clean for drinking. It's free of impurities, dissolved compounds, and pollutants.

Only 2.5% of the world's water is freshwater, which is suitable for drinking and most uses. The rest is saltwater.

Since freshwater is limited, we need technology to purify saltwater and other sources to make water suitable for use. This ensures quality.

According to the World Health Organization, about 25% of people lack safe water for drinking. Millions die yearly due to water-related diseases.

Humans use water for various purposes, including drinking, agriculture, industry, and sanitation.

Freshwater comes from various sources, including rivers, ice, and groundwater.

Human activities and population growth can lead to water scarcity, pollution, and potential conflict due to limited resources.

The continuous movement of water on, above, and below the surface of the Earth.

The process of a liquid turning into a gas, driven by heat energy from the sun.

The process of a gas turning back into a liquid, releasing heat energy.

Increased greenhouse gases cause a warmer climate, intensifying evaporation and potentially reducing rainfall, disrupting the balance of the water cycle.

Industries release pollutants into the atmosphere, affecting water quality and contributing to climate change, which disrupts the natural water cycle.

Using water for cooling industrial processes increases evaporation rates, impacting local water resources.

Urbanization and construction limit water infiltration into the ground, leading to increased runoff and potentially decreasing groundwater levels.

Water is primarily used for agriculture, domestic purposes (like drinking and sanitation), and industries.

Desalination is the process of removing salt and other impurities from seawater to make it drinkable.

The first step in desalination is filtration, where sand and other suspended particles are removed from the water.

Chemicals are added to the water during desalination to help remove dissolved particles.

Water is disinfected in desalination using methods like chlorine, ozone, or ultraviolet light to kill microorganisms.

The following are sources of water evaporation: oceans, rain, groundwater, and water on plant surfaces.

Building and road construction is the main cause of human influence on the water cycle.

Human activities like pollution and diverting water flow negatively impact the water cycle.

Domestic water is used for drinking, cooking, washing, and sanitation.