石油危机曾使世界各国倍感未来能源的缺乏，90年代，世界能源学家们预言：人类将面临一场能源危机，可再生能源将占世界能源的主导地位。1可再生能源在市场中的地位开始提高。能源污染和全球气候变化使一些国家意识到，矿物燃料让他们付出了沉重的代价，即使价格低也得不偿失。 The oil crisis once made the world feel the lack of energy in the future. In the 1990s, world energy scientists predicted that mankind will face an energy crisis and renewable energy will dominate the world energy. 1 The position of renewable energy in the market began to improve. Energy pollution and global climate change have made some countries aware that fossil fuels have paid a heavy toll on them, even at low prices.