Updated 02 October 2015

10 facts about water and the environment

Did you know that there is more water than land. But the problem is that only 0.8% of all this water is safe to drink. The rest is too high in salt to be consumed by us.


  • Water is the only substance found naturally on earth in all three forms, as liquid, solid and gas
  • 80% of the earth's surface is water
  • 97% of the earth's water is saltwater in oceans and seas. Of the 3% that is freshwater, only 1% is available for drinking - the remaining 2% is frozen in the polar ice caps
  • Once evaporated, a water molecule spends ten days in the air
  • 40% of the atmosphere's moisture falls as rain each day.
  • A person can survive for a month without food, but less than a week without water
  • There is exactly the same amount of water currently on earth as there was when the planet was formed
  • In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, around two weeks in lakes and rivers and less than a week in the atmosphere
  • Water serves as nature's thermometer, helping to regulate the earth's temperature
  • 3.79 litres of water weighs 3.79 kg


Read more:
8 glasses a day a myth


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