Points for mentioning one of the few videos that actually work out the cost of growing things without the sun - https://blogs.cornell.edu/hort/2014/02/15/semin

Points for mentioning one of the few videos that actually work out the cost of growing things without the sun - https://blogs.cornell.edu/hort/2014/02/15/seminar-video-skyscraper-farms-and-abandoned-warehouses/ https://blogs.cornell.edu/hort/2014/02/15/seminar-video-skys... The largest human made solar collectors in the world are agricultural fields and clear glasshouses.