"It takes about 20,000 litres of water to produce one kilogram of coffee 11,000 litres for one quarter-pounder hamburger, between 2000 and 5000 litres for a kilogram of rice, and 2000 to 4000 litres for one litre of milk. We grow twice as much food today as we did a generation ago, but we use three times as much water to grow it. To quench the thirst of these crops, many are highly irrigated, and much of the water is being pumped from underground reserves, which take eons to replenish."
-David Suzuki, The Sacred Balance
Reducing food waste is one very positive step you can take towards conserving our precious fresh water resources!
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