"He proposes that 30-storey towers should be built to feed local people in places like Manhattan. You wouldn’t see any change from $100m, possibly $200m. The only crop which could cover such costs is high-grade cannabis. But a 30-storey hydroponic skunk tower would be quite hard to conceal." - George Monbiot, Towering Lunacy, monbiot.com, 16 August 2010.