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自从人类发现和利用煤炭、石油以来,人类生活得到了很大改善。但是,随着人口的增加和对能源认识的不足,几千年后的今天,能源危机逐步显现,许多国家出现了能源匮乏。一方面能源频频告急,一方面环境急剧恶化。当很多人认识到这些不可再生能源的珍贵时,科学家也开始研究能为人类所利用的可再生的、几乎不影响环境的清洁能源。
Since mankind discovered and used coal and oil, human life has been greatly improved. However, with the increase of population and the lack of understanding of energy, the energy crisis has gradually taken place thousands of years later, and the energy deficits have emerged in many countries. On the one hand frequent energy crisis, on the one hand the rapid deterioration of the environment. When many people recognize the preciousness of these non-renewable energies, scientists are also starting to study renewable, clean, environmentally-friendly energy that can be used by humans.