$40 million plantscraper will feed 5000/year

By 2050, the world's population is expected to swell to 9.6 billion, with around 66% living in urban areas. This projection is leaving many cities wondering how they will feed all those people.

A Swedish food-tech company called Plantagon is proposing that cities consider building what it calls "plantscrapers" -- office towers that contain giant indoor farms. Plantagon is constructing its first plantscraper in Linköping, Sweden.

Construction of the $US40 million building began in 2012, and it's set to open by early 2020.

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