RENEWABLE ENERGY USE According to the U.S. Energy Information Administration, as of 2010, renewable sources of energy contributed 3.46 trillion kilowatt-hours (kWh) of total energy production worldwide (about 18% of the total). That amount is projected to more than double to 7.97 trillion kWh by 2035—this will be 22.7% of the total at that time. Of renewable sources, biomass, mostly fuels like wood, charcoal, and animal waste, makes up the largest proportion, followed by energy produced by hydroelectric dams.