Not sure how many caught 60 Minutes last Sunday, but they had a great piece on ground water depletion (both in the California central valley and globally). I mentioned it to a friend and he pointed me to some articles on the rise and fall of agriculture in Saudi Arabia (as they depleted their groundwater over a few decades). Digging further I found this web-app for calculating the water required to produce various foods:
Which of course made me wonder… How much fresh water does it take for the production of 2000 kCal of Soylent?
I’m not necessarily volunteering to dig up all the data, but thought perhaps posting this here might motivate others