The seawater greenhouse uses seawater to cool and humidify greenhouses and to convert sufficient humidity back in to fresh water to irrigate the crops .
海水温室采用海水使得温室比较凉快潮湿，还把盐水变成淡水来灌溉农作物。
The effect is achieved by trickling seawater over porous cardboard screens -- called evaporators -- which cool and humidify the dry desert air , creating a favorable growing environment for crops .
