The amount of energy we can usably harness from the sun is a lot less than is radiated to the earth. Its useful to drive at night and on cloudy days. People als

The amount of energy we can usably harness from the sun is a lot less than is radiated to the earth. Its useful to drive at night and on cloudy days. People also demand similar performance from their future vehicles as they get now. If you're interested in these sort of questions, I highly recommend the following book which I got a few days ago. I'm finding it both sobering and exciting: http://www.amazon.com/Sustainable-Energy-Without-Hot-Air/dp/0954452933/ref=sr_1_1?ie=UTF8&s=books&qid=1246389614&sr=8-1 http://www.amazon.com/Sustainable-Energy-Without-Hot-Air/dp/...