Steven ChuWASHINGTON -- The U.S. Department of Energy (DOE) is not working to lower gasoline prices directly, Secretary Steven Chu said last week at a U.S. House of Representatives hearing after a Republican lawmaker scolded him for his 2008 comment that gasoline prices in the United States should be as high as in Europe.Instead, DOE is working to promote alternatives such as biofuels and electric