
Less than 1% of the total water available on the earth can be used for human consumption.
99.9% of fresh water is contained in the polar ice caps.
50 litres of water are needed to grow a kilo of spinach.
50 kilos of water are required to produce a litre of whisky.
4.5 to 35 litres of water are required to produce 1 litre of beer (Siebel, M.A.).
250 litres of water are needed to produce a kilo of wheat.
250 kilos of water are needed to produce a kilo of steel.
18,000 litres of water are required to refine a ton of petroleum.
25,000 litres of water are needed to produce a kilo of meat.
200,000 litres of water are required to smelt a ton of pig iron.
500,000 litres of water are required to smelt a ton of copper.
3,000,000 litres of water are required to grow a hectare of corn.
More than 3,000,000 litres of water are required every minute in a 1-million kW atomic power station.
4,000,000 litres of water are needed to produce a ton of synthetic fibre.
8,000,000 litres of water are needed to grow a hectare of cabbage.
12,000,000 to 20,000,000 litres of water are needed to grow a hectare of rice.
Source:
R.J. Sinka, Indira Ghandi Centre for Human Ecology, Environmental and Population Studies, India.
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