19994 Hydro-electric energy ltdro-electricay is the largest souce ot renewable erergy, with 978 GW of global raged capacity in 2013 rectesertng 63% cif Octal renewable energy Staled capacity Hydro-elecenc generation is a well established 172 http://cfdocs.btogo.com:27638/cf/drv7/pub/edgar/2015/07/20/000