It takes water to make everything we eat and drink. The Water Footprint Network (WFN) ranks products by how much water they take to produce on average -- their "water footprint." It's broken down into "green" water (rainwater), "blue" water (surface and groundwater) and "gray" water (freshwater pollution created).
Here we show 10 water-intensive foods, and their water footprint. Coffee: It takes an average of 130 liters of water to make one cup of coffee. 96% of coffee's water footprint comes from rainfall. STRINGER/AFP/AFP/Getty Images
Chocolate: The average 100-gram chocolate bar uses 1,700 liters of water. Cocoa production mainly relies on rainfall and has a 98% green footprint.
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Groundnuts: It takes 2,780 liters of water to grow one kg of groundnuts. 89% of its water footprint is green and 5% is blue. Scott Olson/Getty Images North America/Getty Images
Beef: The global average water footprint of beef is 15,400 liters per kg. 99% of its water footprint is linked to growing animal feed and most of it comes from rainfall. But the WFN notes that one piece of beef can be very different from another.
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Pork: Pig meat has a global average water footprint of 5,990 liters per kg. 82% of its footprint is green, 8% is blue and 10% is gray.
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Avocados: It takes an average 2,000 liters of water to grow just one kg of avocados, four times the amount needed to produce the same amount of oranges or a kilogram of tomatoes, according to the WFN.
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Wheat: It takes about 1,827 liters of water to produce 1 kg of wheat. Globally, 70% of its water footprint comes from rainfall and 19% from irrigation.
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Rice sucks up 1,670 liters of water per kg. It relies heavily on rainfall (68%) as well as irrigation (20%) to grow.
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Beer has a global average water footprint of 1,420 liters per kg. One glass of beer (250 ml) costs 74 liters of water. Alexander Hassenstein/Getty Images Europe/Getty Images
Bananas: It takes an average of 160 liters to grow one large banana. Globally, 84% of bananas' water footprint comes from rainfall and 12% from irrigation.
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