Renewable Energies
Renewable energy is the type of energy source that is replenished continuously. Forms of renewable often harness the natural energy in the environment and convert it into a form society can you such as heat or electricity. Renewable energy is a sustainable, clean source of energy and it is the answer to the environmental crisis caused by burning fossil fuels, not to mention the expected increase in energy costs in the future (See graph below). When a fossil fuel is burned for energy, it releases very harmful by-products, or greenhouse gases, to not only the environment, but also humans. Some common types of renewable energy that have a high potential as a future energy source are wind energy, hydro energy, solar energy, and geothermal.