Thursday, June 9, 2011

Water Facts

Water Facts

•According to the United Nations the total volume of water on earth is about 1.4 billion km3. The volume of freshwater resources is around 35 million km3, or about 2.5 percent of the total volume.

•About 70-75% of the earth's surface is covered with water.

•The average person in the United States uses about 80 - 100 gallons of water each day, much of which is taken up by flushing toilets.

•Roughly 340,000 million gallons of fresh water are used every day in the United States.

•People can only use about three tenths of a percent of all the available water on the earth.

•Usable water comes from freshwater lakes, rivers, underground aquifers and the atmosphere.

•About 80 percent of the water in the United States is used for irrigation and thermoelectric power.

•The earth rarely loses or gains extra matter; this makes it a close system, meaning that the same amount of water that existed millions of years ago is still present today.

•It takes 2000 to 5000 liters of water to produce food for one person per day.

•The daily drinking requirement per person is 2 to 4 liters.

• Overuse and pollution of water resources are responsible for harming biodiversity.