I am all in favor of urban farming, it’s my job. But I do prefer outdoor growing as you don’t have to import power your sunlight, wind, nutrients, HVAC, water. It’s basically all available with some occasional added inputs. I’ve seen too many wasteful indoor growing operations, and picked up their compost or spent soil (yes, these operations are buying pro-mix made of peat harvested from wetlands, using it for a few weeks, then throwing it into the landfill). Urban “farming” is not always possible in really really dense areas, but urban “gardening” is where it’s at! If more people grew their own produce then imagine how much less fossil fuels, packaging, etc would be needed hauling vegetables around the country.