Air pollution in London can reduce your life by six months. Yikes, I didn't realise that. Camden council have these stations to measure the quality of the air. Central London charges vehicles a congestion charge during business hours, to try and reduce the number of vehicles. Our current mayor has reversed some of the areas this applies to. The wealthier ones where more polluting vehicles are seen. Electric vehicles may look strange but they are encouraged and are exempt from the congestion charge. If only someone could invent a real alternative to fossil fuels. What say you?