The major pollutant from automobile exhaust is?
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The major pollutant from automobile exhaust is **carbon monoxide (CO)**. Carbon monoxide is produced when carbon-containing fuels such as gasoline or diesel are burned incompletely due to insufficient oxygen during combustion. In addition to carbon monoxide, automobile exhaust also contains pollutants such as nitrogen oxides (NOx), hydrocarbons (unburned fuel), particulate matter (soot), and in some cases, sulfur dioxide (SO2).
These pollutants contribute to air pollution and have significant health and environmental impacts. Carbon monoxide, in particular, is harmful because it reduces the blood’s ability to carry oxygen, leading to adverse health effects such as headaches, dizziness, and in high concentrations, can be fatal. Therefore, efforts to reduce automobile emissions focus on improving combustion efficiency and using cleaner fuels to minimize the release of these harmful pollutants into the atmosphere.