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Where does fresh water come from?There is a limited supply of fresh water available and we are starting to use it up at a faster rate than it can be replaced to keep rivers and lakes healthy. Once water becomes polluted it is very difficult to clean up again. Fresh water can be created through recycling waste water and taking the salt out of sea water, but these are very expensive processes and cannot keep up with the rate that we are using our water supplies. More than half of the world’s supply of fresh water comes from underground bodies of water called aquifers. Water is removed from aquifers using wells and bores dug deep into the ground. This water has taken thousands of years to build up and is being used much faster than it can be replaced. Streams, rivers and lakes hold the rest of our fresh water. But these supplies are getting smaller as large amounts of water are pumped out for irrigating crops and to supply cities. Some of our fresh water supplies are also becoming polluted with sewage, chemicals and waste from farms, cities and towns.
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