5.It has been known that trees enhance rainfall by cooling the land, slowing wind evaporation and (soil) erosion, and transpiring water into the sky from their leaves.

• 人们一直普遍清楚，树木降低土地温度，减慢风的水气蒸发和水土流失，树叶向空中散发出水气，从而促进降雨。