Water Footprint

Carbon Footprint之後，環保份子和環保商人可能會玩 Water Footprint。

這是一堆很恐怖的數字：


The production of one kilogram of beef requires 16 thousand litres of water.
To produce one cup of coffee we need 140 litres of water.
The water footprint of China is about 700 cubic meter per year per capita. Only about 7% of the Chinese water footprint falls outside China.
Japan with a footprint of 1150 cubic meter per year per capita, has about 65% of its total water footprint outside the borders of the country.
The USA water footprint is 2500 cubic meter per year per capita.