The hydrosphere is often called the “water sphere” as it includes all the earth’s water that is found in oceans, seas, streams, lakes, soil, groundwater, and in the air. The hydrosphere interacts with, and is influenced by, all the other four earth spheres including the cryosphere. Water is (...)

The World Health Organisation estimates that 80% of all sickness and diseases are due to inadequate water supplies and poor sanitation. The earth has all the water it needs to supply its 6.3 billion inhabitants with clean water. The problem is that water is not evenly distributed. Ninety (...)

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