请英文好的朋友帮助翻译一下以下的句子。

There is very limited water resource on earth. At present, fresh water, which is drinkable, constitutes only 3% of the earth's overall water, of which 2% are contained in the polar glacier and ice cap which are not usable. Therefore, 80 countries, which constitute 40% of the world's population, are confronted with the crisis of severe shortage of drinkable water.

Very limited is the water resourse on the earth, and of all the water we know on this planet , fresh water is only about 3%,including 2%,which is the polar glacier and the ice cap,quite unavailable for use. Therefore, 80 countries that make up 40% of the world's population are facing the water shortage.

Water on the earth is limited, the world for effect of water to fresh water accounts for only 3% of all water on earth, but fresh water accounts for 2% of polar glaciers and ice caps, can't use. So 40% of the population of the world's 80 countries are faced with water shortage risk.