能源就是能够提供能量的物质。大自然赋予人类的能源多种多样,可分为常规能源和新能源两大类。技术上比较成熟而使用较为普遍的能源称为常规能源,如煤炭、石油、天然气、水能等。近几十年才开始利用或正在开发研究的能源称为新能源,如太阳能、核能、沼气能、风能、氢能、地热能、海洋能、电磁能等。 Energy is a substance that can provide energy. Nature gives people a variety of energy sources, which can be divided into two categories: conventional energy and new energy. The more technologically mature and more commonly used energy sources are called conventional energy sources such as coal, oil, natural gas, and hydropower. The energy that has only been used or being developed in recent decades is called new energy, such as solar energy, nuclear energy, biogas energy, wind energy, hydrogen energy, geothermal energy, ocean energy, and electromagnetic energy.