The war against air pollution has begun – and it will be fought in cities

The air pollution crisis is getting worse. As the world becomes increasingly urbanised, the battle will be won or lost on the streets of our citiesSuffocating planet: air pollution around the world today – live“You never see ‘air pollution’ written as the cause on death certificates,” an expert once told me. If it was, she suggested, the enormous toll toxic air takes on the health of billions of the world’s people would prompt a global emergency response.But t