Fossil fuels, such as coal, oil, and natural gas, are non-renewable energy sources because they are formed from the remains of ancient plants and animals and take millions of years to replenish.

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

Burning fossil fuels releases pollutants into the air, water, and land, contributing to air pollution, water pollution, and land pollution.

A carbon tax, cap-and-trade system, and renewable portfolio standard are all policies that are designed to reduce greenhouse gas emissions.

The Clean Air Act, Clean Water Act, and National Environmental Policy Act are all regulations that are designed to protect the environment from energy-related activities.

Hydropower can fragment aquatic habitats, disrupting the movement of fish and other aquatic organisms.

Wind turbines can kill birds that fly into them, especially during migration.

Solar farms require a lot of land, which can compete with other land uses, such as agriculture and conservation.

Nuclear power plants produce radioactive waste that must be safely stored and disposed of.

Geothermal power plants can release harmful chemicals into the air and water.

Biomass energy can contribute to deforestation, which can have a number of negative environmental impacts, such as soil erosion, loss of biodiversity, and climate change.

Energy efficiency reduces the amount of energy that is needed to perform a task, which can have a number of positive environmental impacts, such as reducing air pollution, water pollution, and land use.

Energy conservation reduces the amount of energy that is used, which can have a number of positive environmental impacts, such as reducing air pollution, water pollution, and land use.

Renewable energy sources, such as solar, wind, and hydropower, do not produce greenhouse gases or other pollutants, which can have a number of positive environmental impacts, such as reducing air pollution, water pollution, and land use.

Non-renewable energy sources, such as fossil fuels, produce greenhouse gases and other pollutants, which can have a number of negative environmental impacts, such as air pollution, water pollution, and land use.