"Producing food locally reduces greenhouse gas emissions and stimulates local economies by re-circulating money and creating an income multiplier effect, according to research done byChris Hild, a policy adviser for the city’s food system."
http://thethunderbird.ca/2012/04/03/urban-farmers-in-vancouver-plant-around-municipal-by-law/
http://www.insidevancouver.ca/2014/07/18/edible-lawns-catch-on-in-vancouver/