受制于化石能的有限性,选择新的能源是大势所趋。解决环境破坏问题有一个重要的方法,就是把社会成本变成私人成本。电动车不可能全面推广其应该瞄准公交车市场。在北京很多公交车已使用电动车,部分出租车也在使用。这在某种条件下是很好的选择方案。燃料电池比蓄电池更为昂贵,所以现在燃料电池看不到有推广的前景。选择一个方案必须考虑经济上的合理性。在方案选择上不能使用太多的社会资源,因为社会资源包括劳动资本、土地资源等都是可以用钱量化的,整个社会面临的问题很多,贫困、教育、看病都需要用到钱, Subject to the limited energy of fossil fuels, choosing new sources of energy is the general trend. An important way to solve the problem of environmental destruction is to turn social costs into private costs. Electric cars can not be fully promoted It should aim at the bus market. Many buses in Beijing have used electric vehicles, some taxis are also used. This is a good choice under certain conditions. Fuel cells are more expensive than batteries, so there is no prospect of fuel cells now. Choosing a program must consider economic rationality. Since social resources, including labor capital and land resources, can all be quantified using money, there are many problems facing the whole society. Poverty, education and medical treatment require money,