>We could produce the same amount of food with a tenth the water we do currently. ... A simple system, like drip irrigation, could save 50%. I was thinking exa

>We could produce the same amount of food with a tenth the water we do currently. ... A simple system, like drip irrigation, could save 50%. I was thinking exactly the same thing after reading the OP and the first few comments of this HN thread. Israel and other countries use drip irrigation very effectively. But if climate change happens on a large enough scale and with enough effect, we will have more problems than can be solved by drip irrigation alone.