2017世界水日的英语作文：世界水日
2017世界水日的英语作文：世界水日
water is one of the most valuable resource in the world, is the ideal liquid to sustain life. mammals in vivo is between 60% and 65% water, two-thirds of the human body weight, 99% of the brain, bones are about 44% water. lack of water, the human and the earth will not survive, forests will disappear, the plant will perish, the earth will appear the boundless desert, signs of life will disappear.
currently the world's fresh water accounts for only 2.5% of the total water resources, of which more than 70% is frozen in the arctic and antarctic ice sheets, and it is difficult to use the snow on the mountain glaciers and permafrost, 87% of the fresh water resources is difficult to use. humans really able to take advantage of the freshwater resources is part of the rivers and lakes, and groundwater, accounts for about 0.26% of the earth's water.