Water on Earth

There is approximately the same amount of water on Earth today as there was when the Earth was formed.

Water is continually recycled in the Earth’s hydrologic cycle.

The dinosaurs once drank the same molecules that are in your faucet.

Nearly 97% of the world’s water is saltwater or otherwise undrinkable.
Another 2% is held in ice caps and glaciers. That leaves just one percent for all of humanity’s needs – agricultural, residential, manufacturing, and community needs. (United States Geological Survey)

Water regulates the Earth’s temperature. It also regulates the temperature of the human body, carries nutrients and oxygen to cells, cushions joints, and protects organs and tissues. The human brain is 75% water. Human blood is 83% water and bones are 25% water. (American Water Works Association)

Each day, the sun evaporates 1,000,000,000,000 (one trillion) tons of water. (United States Geological Survey)

In a one hundred year period, an average water molecule spends 98 years in the ocean, 20 months as ice, about two weeks in lakes and rivers, and less than a week in the atmosphere.

Groundwater can stay polluted for several thousand years, Millions of years if the contaminant is radioactive!.

At least 1 billion people must walk three hours or more to obtain drinking water. Nearly 2% of U.S. homes have no running water. In Mexico, 15% of the population must haul or carry water. (National Geographic Society)

Households turn on water faucets an average of 70 times daily. It is estimated that up to 50% of the water families use could be saved by implementing simple conservation methods.

One inch of rain falling on one acre of land is equal to about 27,154 gallons of water. (United States Geological Survey)

The 250 million U.S. residents living today have access to about the same amount of water as U.S. residents did 200 years ago, when the population was four million.

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