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mercredi 16 janvier 2013

L'eau ressource essentielle


Table 1: Typical values for the volume of water
required to produce common foodstuffs
[37]

Foodstuff                Quantity                   Water consumption

Apple 1 kg 822 litres
Banana 1 kg 790 litres
Beef 1 kg 15,415 litres
Beer 1 × 250ml glass 74 litres
Bio-diesel 1 litre 11,397 litres
Bread 1 kg 1,608 litres
Butter 1 kg 5,553 litres
Cabbage 1 kg 237 litres
Cheese 1 kg 3,178 litres
Chicken meat 1 kg 4,325 litres
Chocolate 1 kg 17,196 litres
Egg 1 196 litres
Milk 1 × 250ml glass 255 litres
Olives 1 kg 3,025 litres
Pasta (dry) 1 kg 1,849 litres
Pizza 1 unit 1,239 litres
Pork 1 kg 5,988 litres
Potatoes 1 kg 287 litres
Rice 1 kg 2,497 litres
Sheep Meat 1 kg 10,412 litres
Tea 1 × 250 ml cup 27 litres
Tomato 1 kg 214 litres
Wine 1 x 250ml glass 109 litres
Cotton 1 @ 250g 2,495 litres

Water required to produce one pound (1 lb.) of:
  • Pork = 576 gallons of water
  • Chicken = 468 gallons of water
  • Soybeans = 206 gallons of water
  • Wheat = 138 gallons of water
  • Corn = 108 gallons of water


Another source:
http://www.janegoodall.ca/project-blue/FoodProductionandWater.html

      • 16,000 - 100,000 litres of water to produce 1 kg of beef
       
      •  3,000 - 4,500 litres of water to produce 1 kg of rice
       
      •  1,350 - 1,500 litres of water to produce 1 kg of wheat
       
      •  990 - 1,000 litres of water to produce 1 litre of milk
       
      •  500 litres of water to produce 1 kg of potatoes
       
      •  140 litres of water to produce 1 cup of coffee
        (most used during the growing, processing and transportation)
       
      •  25 litres of water to produce 1 litre of beer
       
      •  1 litre of water to produce 1 kg of vegetables

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