Carbon dioxide is a greenhouse gas that traps heat in the atmosphere, contributing to global warming.

The burning of fossil fuels, such as coal and oil, releases sulfur dioxide and nitrogen oxides into the atmosphere, which react with water to form sulfuric acid and nitric acid, leading to acid rain.

Solar energy is a renewable energy source that harnesses the power of the sun to generate electricity.

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create glucose and oxygen.

Agriculture is a major cause of deforestation, as forests are cleared to make way for farmland.

The hydrologic cycle is the process by which water moves through the Earth's atmosphere, land, and oceans.

Sewage is a major pollutant of water bodies, as it contains harmful bacteria and nutrients that can lead to eutrophication.

Transpiration is the process by which plants release water vapor into the atmosphere through their leaves.

Vehicle emissions are a major cause of air pollution, as they release harmful pollutants such as carbon monoxide, nitrogen oxides, and particulate matter.

Nitrogen fixation is the process by which nitrogen is converted into a form that can be used by plants, such as ammonia or nitrate.

The burning of fossil fuels is a major cause of climate change, as it releases greenhouse gases into the atmosphere.

Carbon sequestration is the process by which carbon dioxide is removed from the atmosphere and stored in a long-term reservoir.

Habitat destruction is a major cause of biodiversity loss, as it reduces the amount of available habitat for species.

Nutrient cycling is the process by which nutrients are recycled within an ecosystem, ensuring their availability for plant growth.