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.
The hydroponic system rotates the plants on a conveyor belt via a "feeding station" to create airflow and stimulate growth.
Source: http://news.bbc.co.uk/2/hi/uk_news/england/devon/8282288.stm
