It has always puzzled me why all power plants did not have thermal electric devices attached to turn the waste heat into additional energy. It is amazing when you start adding up all of the wasted energy used across the world to generate power. I think the true efficiency is about 20% for all heat based systems. I am not sure if wind or hydro plants waste as much, but before we go around making radical changes to human behavior, we should first conduct a comprehensive analysis on all of the POWER we WASTE every day. I suspect the answer will amaze everyone.