What are the benefits of restaurants producing food onsite?

Here is an American YouTube video suggesting how NASA developed Aeroponics could be used in a restaurant context:

Is it viable to grow food onsite?
If so, what food crops would be suitable?

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About

Rachel Wingfield created this Ning Network.

A vision of a city that metabolizes its resources and waste to supply its inhabitants with all the nourishment they need and more.

MetaboliCity was initiated by London based design studio Loop.pH in 2008.