But that's exactly what is happening. The water being used for, say, almonds, is water that would/could otherwise be used for drinking water, and when a single Californian almond uses 12 litres of water, and around 2 1/4 billion pounds of almonds are grown a year... I can't be arsed to do the maths... actually, I will. Seems it's around 480 almonds a pound, so multiply 480 by 2.25 billion is one trillion and 35 billion almonds. Multiply that by 12 litres is... too many litres of water for my head (or the planet) to handle.