懂你英语 Level3 Unit3 Part3 Vocabulary - Sources of Energy
Solarenergyisoneofthecleanestandmostplentifulsourcesofenergy.Solarpowerdependsonsunlight,soincloudyweatherandatnight,nopowerisgenerated.Windenergyisnon-pollutingbutisonlyusefulinplaceswherethereisalot