denvergeldings wrote: Wind is notoriously unreliable, solar is not break through cost effective yet, and no one even mentions hydrogen that is in the air and will probably be the next fuel source.The most critical area of research at NREL is alternative fuels including hydrogen and biofuels.http://www.nrel.gov/learning/avf_alternative_fuels.htmlYou do not hear as much about these programs as the so