The Forbes 2020 team of experts and authors predicts that by the year 2018, 20% of all food consumed in U.S. cities will come from rooftop and parking lot farms. Read that again: 20% of all food in the US.
Has anyone read the full report? That claim seems incredible, in both senses of the word, and I'm curious what their line of reasoning was.
Strikes me more as garden-variety fearmongering than anything useful.