Flip the switch with your power provider and go green! 91% of all electricity produced in the U.S. comes from non-renewable sources, 77% of which is produced by burning fossil fuels (oil, natural gas and coal). These fuel sources produce the most carbon dioxide (CO2) of any industry in the world. But you can make a difference. More than 750 local utilities have green energy programs that use renewable sources such as sun, wind and water. If that's not an option, you can purchase renewable energy certificates or RECs (also known as green tags) and trade them for the power you get from your local utility. Take charge and make your electricity more renewable today.