Renewable Energy is often called clean energy, comes from renewable resources, such as wind energy, solar energy, hydropower, biomass energy ( such as ethanol), and geothermal energy.

A deregulated energy market allows competitive utility companies to buy and sell electricity and natural gas by allowing market participants to invest in transmission lines and power plants. Owners will then sell this wholesale market to retail suppliers.

Clean energy comes from renewable, zero-emission sources that do not pollute the atmosphere when used and energy saved by energy efficiency measures.