Brighton is officially Britain’s greenest city with a Green council newly elected in May. Paradoxically, Lewes, which is arguably the greenest town in Britain, has just elected a Conservative council. One of the first announcements by Brighton has been a commitment to pilot a household food waste collection and to specify which technology they would like to see treating this waste. The answer to the latter is (surprise.. ) anaerobic digestion. This is good news for fans of biogas plants like us, but what will it mean in practice, and how hard will it be to deliver?