In the fall of 2007, VBS went to Linfen, China to look at the worlds most polluted city. Go to VBS.TV for more.
On the road into Linfen, the cars seem to disappear into dense smog that clings to vanishing buildings.
Inside Linfen, once named the world's most polluted city, Chinese officials say they are closing down some polluters.
Most people looking out across the sky of a large city are aware that breathing in that hazy, gritty cocktail of suspended pollutants simply cannot be good for the health.