About 71% of the Earth's surface is covered in water, but only 3% of the world’s water is fresh. Of this 3%, a mere 0.5% is available for us to use. This is because most of the earth’s fresh water is locked up in glaciers, polar ice caps and the atmosphere or lies deep underground. Furthermore, a growing proportion of the ‘fresh’ water available to us is polluted and unfit for domestic, industrial and agricultural use.
While the earth’s population has grown rapidly, the amount of water available remains broadly the same.
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