World Water Supply
The amount of water we have on earth is always the same . However, clean water, is getting rarer because of pollution .
Most of the world’s water, about 97% is in the oceans. 1.4 billion cubic kilometres is saltwater. Only 3% is the freshwater in lakes, rivers and glaciers.
Much of the world has enough fresh water but there are regions that are too dry and don''t get enough rain. Developing countries often do not have enough water for their growing populations . Other areas do not have enough water because people waste it.
Where the world's water comes from