Day: April 20, 2012

“Many people call Earth the “water planet” because about 70 percent of Earth’s surface is covered by water. But, only a small portion is available for human use. Of the world’s total water supply, 97 percent is located in the...

“Many people call Earth the “water planet” because about 70 percent of Earth’s surface is covered by water. But, only a small portion is available for human use. Of the world’s total water supply, 97 percent is located in the...

“Many people call Earth the “water planet” because about 70 percent of Earth’s surface is covered by water. But, only a small portion is available for human use. Of the world’s total water supply, 97 percent is located in the...