The International District Energy Association (IDEA) makes the point that heat waste throughout the U.S. economy could be put to productive use by way of "district energy and cogeneration" (also called combined heat and power), if sensible policies and incentives were in place. Amory Lovins of the Rocky Mountain Institute has pointed out that such "micro-power" as combined heat and power -- as well as efficiency ("negawatts") and renewables like wind and solar -- has been beating new nuclear power economically in the free market for a very long time, as in his report "The Nuclear Illusion."