With the residents in the city with traffic jams. Pollution and smoke it a lot. When inhaled into. Cause choking smoke. And if more breathed a long time to be sick.
In the section that is in favor of big city living in a traffic jam problem and there was a lot of smoke pollution. When you inhale a breath will cause symptoms even if they inhale smoke and choked for breath, fell ill.
In the seen with the living in a large city there is a problem with the traffic and the pollution smoky when a lot of breath to make a gagging smoke and breathe more if rare, fell ill.