Virtual water trade (also known as trade in embedded or embodied water) refers to the hidden flow of water if food or other commodities are traded from one place to another.
How much water is there in your espresso? 140 litres. It takes 140 litres to grow, package and ship the beans that make 1 cup of coffee.
Tony Allan describes this book as a primer for the enormous body of his research and as such it is also very interesting because it has been written and graphically designed specifically to facilitate political action.
http://en.wikipedia.org/wiki/Virtual_water
http://virtualwater.eu/
http://www.virtual-water.co.uk/
