1 In recent years, the U.S. has seen a number of winter storms that have caused surprisâ¦. 2  The Periodic Table of Elements Life is sustained by a number of chemical elements. 3  They are responsible for the birth of planets and the evolution of cells to complex organisms.
Water distribution on Earth - Distribution of saline and fresh water. 1  The total volume of water on Earth is estimated at 1.386 billion kmÂ³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water. 2  The total volume of water in rivers is estimated at 2,120 kmÂ³ (510 cubic miles), or 2% of the surface fresh water on Earth.
WATER CONSERVATION FACTS AND TIPS. Less than 2% of the Earthâs water supply is fresh water. Of all the earth's water, 97% is salt water found in oceans and seas. Only 1% of the earth's water is available for drinking water. Two percent is frozen. The human body is about 75% water.