水污染英文版
It covers 71% of the earth's surface and makes up 65 % of our bodies. Without the seemingly invaluable compound comprised of hydrogen and oxygen, life on Earth would be non-existent
Water is Essential for Life
Three fourths of the surface of the Earth is covered with water. Nearly 98% of the water on Earth, though, is seawaterunfit for drinking and not even suitable for most industrial purposes. Something less than 2% of the water is frozen in the polar ice caps, leaving less than 1%  ...