Source : US Department of Energy "Enough solar energy falls on the surface of the earth every 40 minutes to meet 100 percent of the entire world's energy needs for a full year. Tapping just a small portion of this solar energy could provide all of the electricity America uses."
Vinod Khosla, |
Solar energy = 100,000 Terawatts/year Human use in 2050 = 15 Terawatts |
