It’s a short bicycle ride for David Ransom along a railway path to the heart of inner-city Bristol. And there’s no lack of ambition – to make the place into Britain’s first ‘Transition City’. Even in the East End of London, a new forest of networks is flourishing.

Addressing climate change can seem a colossal task. Melanie Jarman reports on the emerging ‘transition town’ movement, which is encouraging citizens’ participation in long-term planning to change energy use at a local level.