In the heart of Montreal, Canada, on 3 football fields (15,000 square meters) of roof-space sits a mega-greenhouse.
Large-scale roof-top greenhouses are growing in popularity, especially in urban areas. They are excellent for high-value crops or crops which require chilled transportation. This one produces 12,000 kilos of tomatoes & eggplants per week.
And because of the tightly controlled environment, there are more crops per annum & more options around energy,fertilizer & water inputs.
This greenhouse has a water system that collects & reuses rainwater, resulting in savings of "up to 90 percent" compared to a traditional farm.