We don't need too much water to grow many crops. http://www.gereports.com/post/91250246340/lettuce-see-the-future-japanese-farmer-builds http://www.gereports.c

We don't need too much water to grow many crops. http://www.gereports.com/post/91250246340/lettuce-see-the-future-japanese-farmer-builds http://www.gereports.com/post/91250246340/lettuce-see-the-fu... "the farm can also cut its water usage to just 1 percent of the amount needed by outdoor fields."