page_title: Exhaust gas
section_title: Internal-combustion engines
hierarchical_section_title: Exhaust gas / Types / Internal-combustion engines
caption_attribution_description: English: Automobile exhaust gas. White exhaust gas is mostly water vapor. Black smoke could come from oil burning.
context_page_description: Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline, petrol, biodiesel blends, diesel fuel, fuel oil, or coal. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe, flue gas stack, or propelling nozzle. It often disperses downwind in a pattern called an exhaust plume.
  It is a major component of motor vehicle emissions, which can also include:
  Crankcase blow-by
  Evaporation of unused gasoline
  Motor vehicle emissions contribute to air pollution and are a major ingredient in the creation of smog in some large cities. A 2013 study by MIT indicates that 53,000 early deaths occur per year in the United States alone because of vehicle emissions. According to another study from the same university, traffic fumes alone cause the death of 5,000 people every year just in the United Kingdom.
caption: Automobile exhaust
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