保证能源供应是人类社会赖以生存和发展的最重要条件之一。本世纪初,基于对化石能源开始耗竭比较清晰的分析和大量使用化石能源引起的环境污染与气候变暖日益明显与严重,全世界已普遍认识到,必须最大限度地提高能源生产与利用效率,清洁、有效地利用各种能源,在较长时期内向着减小化石能源份额,增大可再生能源 Ensuring energy supply is one of the most important conditions for the survival and development of human society. At the beginning of this century, based on the clearer analysis of the start of the depletion of fossil fuels and the increasingly obvious and serious environmental pollution and climate warming caused by the fossil fuels, it is generally recognized in the world that the efficiency of energy production and utilization must be maximized, Clean and effectively use various energy sources, in the longer term to reduce the share of fossil fuels and increase renewable energy