International Renewable Energy Agency: "100% Renewable-Powered World ‘Technically Feasible and Economically Viable’ by 2030" !
http://ecowatch.com/2015/11/24/renewable-powered-world/
http://ecowatch.com/2015/11/24/renewable-powered-world/
Our sun could power all our energy needs on earth x 11,000...and we can easily harvest it