Main attention will be given to house hold use Buildings and appliances now use about 38% of the total energy consumed in Us, industry uses another 36%, and transportation 26% Se ource Use Natural Gas Electricity Fuel oil LPGa Space heating 3.32 0.39 0.58 0.28 Water heating 1.15 0.36 0.13 0.05 Appliances 0.37 1.67 0.05 Air-conditioning 0.62 Refrigerators Lighting al PGi stands for liquefied petroleum gas, most commonly propane, Source: Energy Information Administration, Washington, D.C. U.S. Department of Encrgy. 2004 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan UniversityMain attention will be given to house hold use. Buildings and appliances now use about 38% of the total energy consumed in US, industry uses another 36%, and transportation 26%