President of the Landscape Institute Noel Farrer reportedly expressed support for food growing on the capital's rooves as an answer to climate change. Take a look at Sustain's Capital Growth project which supports food growing spaces in London.
Sustain: Sustain The alliance for better food and farming advocates food and agriculture policies and practices that enhance the health and welfare of people and animals, improve the working and living environment, enrich society and culture and promote equity.