Keywords: Available Energy-3.svg en Useful energy exergy in surface incident solar radiation wind and geothermal1 compared to global consumption - Energy Information Administration in 2004 447 605 Quadrillion btu/yr 14 965 x 10 12 Watts 2 2016-05-23 own GabrielGGD other versions cc-zero Solar energy statistics Wind energy statistics Geothermal energy statistics Climate change |