Sorry, I couldn’t resist posting this article. Look at the points the author is making about why it’s better to grow the produce on the roof.
UPI Article
Fresh produce grown on supermarket roof
NEW YORK, Sept. 14 (UPI) — The local foods movement involves farmers selling directly to consumers, but a U.S. company calls its plan to grow produce on supermarket roofs “ultra local.”
Paul Lightfoot, chief executive officer of BrightFarms, says the New York City company designs, finances and builds greenhouses for retailers’ roofs, and then sells the hydroponic lettuce, greens and tomatoes to the stores below.