Irrigation is the biggest water loser
WorldChanging has this excellent post on water and irrigation, Saving The World, Drip By Drip, with an interesting discussion in the comments about irrigation and water wastage. (I made a point about Australia's drought situation and cotton's water inefficiency, which I've posted on before.) The post's author, Jeremy Faludi, insists that:
inefficient irrigation wastes more water than all the people of the world use (efficiently or inefficiently) for all their drinking, bathing, manufacturing, and industry.Sobering thought, considering my last spray about nuclear power and water missuse.