Solar energy is a renewable resource because it comes from the sun, which is a constantly replenished source of energy.

Vehicle emissions, particularly from cars and trucks, are a major source of air pollution in urban areas.

Natural gas is a non-renewable resource because it is formed from the remains of ancient plants and animals that have been buried and subjected to high pressure and temperature over millions of years.

Evaporation is the process by which water moves from the Earth's surface to the atmosphere.

Carbon dioxide is a greenhouse gas because it traps heat in the Earth's atmosphere, contributing to global warming.

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

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

Condensation is the process by which water vapor in the atmosphere condenses into liquid water.

Solar energy is a renewable energy source because it comes from the sun, which is a constantly replenished source of energy.

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

Agricultural runoff is a major cause of water pollution, as it contains fertilizers, pesticides, and other chemicals that can harm aquatic life.

Precipitation is the process by which water falls from the atmosphere to the Earth's surface.

Forest fires are a major cause of air pollution in rural areas, as they release large amounts of smoke and other pollutants into the atmosphere.

Infiltration is the process by which water moves through the Earth's crust and rocks.

Agricultural practices, such as plowing and overgrazing, can lead to soil erosion.