How polluted is YOUR city? Live interactive map shows exactly how much harmful smog is in the air where you live right now

Beijing based environmental monitoring project, the World Air Quality Index is publishing real time pollution maps across the world (pictured) to reveal levels of harmful particulate matter. PM2.5 particulates from car fumes and fossil fuel burning are thought to pose a high risk to human health. The maps allow city residents to see when are the best times to venture outside.