Marv Fritz runs a 24-acre greenhouse in O’Neill, Neb., in the north-central part of the state. The 7-year-old greenhouse produces about 250,000 pounds of tomatoes a week during the height of summer.
After months of record heat across the Midwest, Fritz said this greenhouse, run by local company Garden Fresh Vegetables, uses very little water.
“We probably use, I don’t know, 2 or 3 percent of the water that a corn crop would use covering the same acreage,” Fritz said.
http://kbia.org/post/drought-and-heat-some-farmers-try-hydroponics