 Trees in cloud forests collect the liquid water in fog or low clouds onto their surface, which drips down to the ground.These trees still contribute to evapotranspiration, but often collect more water than they evaporate or transpire.In rainforests, water yield is increased (compared to cleared land in the same climatic zone) as evapotranspiration increases humidity within the forest (a portion of which returns quickly as precipitation experienced at ground level as rain).