This could get interesting...

This article is from the bbc

Vertical crop system is piloted

vertical crop growing system
The system can be powered by wind or solar energy, as well as electricity

A new vertical method for growing crops which claims to use less land and only 5% of the water usually needed is being piloted at a Devon zoo.

The system grows plants in trays of water moving on a conveyor belt.

The company behind it, Valcent, based in Launceston, Cornwall, said it was a sustainable solution to the world's "rapidly-diminishing resources."

Paignton Zoo is planning to use it to grow herbs, leaf vegetables and fruit as food for its animals.


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