Fruits and veggies are good, the nuts grown here require something like a gallon of water to grow one almond, absolutely rediculous when we have major water shortage issues because we were too stupid to make modern desalination plants. We just got off our asses and made 2 finally, but we still need a lot more. As for the power required for that, we have a giant ocean that offers tidal, solar, and wind power that when combined can cover electrical operating cost and they can grow and process algae like the navy is doing to fuel any combustion engines that need it.
The guy in the video was hired by the navy to make the largest algae farm in america in order to meet the 2020 mandate that the navy must use 50% of its fuels derived from biofuels.
http://www.navy.mil/submit/display.asp?story_id=50710