Types of Renewable Energy
Renewble Energy - Solar PV
Solar shingles are installed on a rooftop. Credit: Stellar Sun Shop
The United States currently relies heavily on coal, oil, and natural gas for its energy. Fossil fuels are non-renewable, that is, they draw on finite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. In contrast, the many types of renewable energy resources-such as wind and solar energy-are constantly replenished and will never run out.