a city engulfed in smog and polluted air due to vehicle exhaust emissions. concept of emissions from internal combustion engine

pollution air traffic car road gas environment smog health exhaust ecology transportation pipe vehicle city atmosphere industry smoke danger disaster dirty auto transport nature background dioxide fog automobile environmental technology gasoline contamination emissions climate change muffler sustainability quality waste incineration monitoring eco global warming engine sustainable fumes impact emission steam carbon footprint engulfed polluted emissions concept internal combustion vehicles inefficiency system aerial view