Each day in the United States, thousands of companies' burn fossil fuels to heat boilers, melt metals, run engines and cook the food that lines grocery store shelves. Despite industry efforts to use heat from burning fuel as efficiently as possible, staggering amounts literally go up in smoke each year. According to the U.S. Department of Energy (DOE), 20 to 50 percent of all fuel burned goes unused into our atmosphere as wasted heat. If harnessed, the potential waste heat capacity, in the U.S. alone, could generate 46 GWs of new, clean electricity annually. That is enough electricity to replace (or not build) 92 500-MW gas-fired combined cycle power plants, whole producing zero emissions.