Did you know Virtual water is the amount of water that is embedded in food or other products needed for its production. A water footprint is quite simply the volume of water used.  Examples of virtual water usage:
1 cup of coffee needs 140 litres of water.
1 litre of milk needs 800 litres of water.
1 kg of wheat needs 1100 litres of water.
1 kg of rice needs 2300 litres of water.
1 kg maize needs 900 litres of water.
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