Urban Farming.  You might not think of farming in any setting as a technology, but there can be a high level of tech involved. Such as Freight Farms, a Boston company. Hydroponic growing systems in a shipping container. www.freightfarms.com . Or have a look at “The Largest Vertical Farm in the World, in One of the World’s Smallest Countries”. (Switzerland). The Story of Yasai. www.agritecture.com  “Urban Agriculture Tool Kit”. www.usda.gov/sites/default/files/documents/urban-agriculture-toolkit.pdf  “Farming in the City”. www.farmers.gov/blog/farming-in-city  and “Farming in the City” at www.youtube.com .Learn the “Top 10 Cities for Urban Ag”. www.agritecture.com.  These cities are: NYC, Atlanta, Victoria BC, Toronto, London UK, Paris, Dubai, Singapore, Brussels, and Manila. And “10 American Cities Lead Urban Agriculture” www.agfundernews.com 5/30/14. In 2014 these cities were: Detroit, Portland OR, Austin, Boston, Cleveland, Chicago, Seattle, Baltimore, Milwaukee, and Minneapolis.  And finally, take a look at “Vertical Farms Could Take Over the World” at www.youtube.com .