'The most satisfying thing I have ever done'

Vegetable evangelist George Monbiot on his healthy obsession with home-grown produce: Why do people become obsessed with growing vegetables? It's not exactly high-octane. It won't make you rich or boost your social status. But millions who can afford to buy their food devote every free moment to the kind of labour our ancestors were glad to abandon. I think it is because the results are tangible.