World Day this year - "Clean Water for a Healthy World". Although our planet is literally flooded with water, only 1% of it is available for use by man, and the rest goes to the share of the oceans, ice and atmosphere. The main source of all fresh water - oceans, of which evaporates annually about 500 thousand square meters. km of water (72,000 from the water surface land). 80% of all deposits back into the ocean and fall.
Freshwater resources in the world are distributed very unevenly. Arid or semi-arid regions of the world, constituting 40% of the land, use only 2% of world reserves of water.
The world's fresh water is increasing, and its consumption is growing.