alternative energy
noun/ɔːlˌtɜːnətɪv ˈenədʒi/
/ɔːlˌtɜːrnətɪv ˈenərdʒi/
[uncountable]- electricity or power that is produced from the sun, wind, water, etc. in ways that do not use up the earth's natural resources or harm the environment
替代能源：由太阳，风，水等产生的电能或电力，不会消耗地球的自然资源或损害环境