能源是人类社会赖以生存和发展的重要物质基础。在当今世界,随着生产的飞跃发展和人类生活水平的提高,能源供需矛盾十分突出。节约能源就是要以尽可能少的能源消耗生产更多的社会产品。它是缓解能源供需矛盾最有效、最便宜的办法,因而能源界称之为“第五大能源”。 当前,全世界第五能源的开发工作已取得重大进展。如许多工业发达国家的能量效 Energy is an important material basis for human society to survive and develop. In today’s world, with the rapid development of production and the improvement of human living standards, the contradiction between energy supply and demand is very prominent. To save energy is to produce more social products with as little energy consumption as possible. It is the most effective and cheapest way to ease the contradiction between energy supply and demand, and the energy industry calls it the “fifth largest energy source.” At present, significant progress has been made in the development of the fifth energy in the world. Such as the energy efficiency of many industrialized countries