BBC: The vast cooling towers in Didcot dominate the Oxfordshire landscape as they belch out plumes into a clear sky. It evokes an image of cigarette smoke on an industrial scale. But the association is misleading. As the Department for Environment, Food and Rural Affairs (Defra) says: “While existing coal plants are a contributing factor to climate change, the damaging emissions are invisible.” “People associate cooling towers with pollution,” bemoans Steve Waygood, …