RE: RE: RE: Energy sources of the futureTrue but. Solar thermal collects UV which still comes through clouds. In shoulder season they are still working very well. And in our area (Calgary) we use double wall evacualted tubes. When its -40 they are still 90% efficient as the summer and we have the most sun hours in all of canada so here it makes more sense. Big problem is cost of all renewables.. they are expensive and right now the pay back is long. Enmax out here is looking to generate 4MW locallly in the houses in calgary. Very interesting project. i am working on the controls for the engines they will be running. Anyways Coal is king.. :) Thats where all our money will come from.. renewables are just really fun. TTY