Only 5% of the mass of planet Earth is water.

Only 5% of the mass of planet Earth is water. Of this, only 2.5% is fresh water that we can use for industrial, agricultural and domestic purposes. Against this precious rarity and its intolerable waste, during the last half century the world’s growing population has tripled the amount of fresh water it takes. It is estimated that more than half a billion people in the world are without access to safe and nearby sources of water; one billion are without sanitation. Eighty per cent of both industrial and civil water discharges are emitted directly into the environment without any treatment. If we continue to dump plastics in the sea at the rate of recent years, by 2050 there will be more plastic in our oceans than fish. Finally, we have global warming, with its burden of advancing desertification, ocean acidification, coral reef bleaching and extreme weather phenomena.