The amount of water we the animal kingdom consume!! most of it we returned back to the atmosphere!! but the amount of water which the plant kingdom consumes which is much greater than animal kingdom!! do never return back to the atmosphere!! plant breaks down the water molecule and fix its hydrogen molecule into starch!! till now our scientists r not aware of it but i personally think that it is the major cause of decrease of underneath water level of the earth!! u just answer it !!how much water a plant return back to the atmosphere which it consume throughout the day!!