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Nearly 70% of it is from cars. 20% is from Methane (from farting), and the rest from cloroforocarbons (or something like that) that used to be in the air back in the 70's (it was found in spray cans).

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14y ago
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12y ago

The answer is that every one driving motor cars and bikes pollutes the environment by releasing CO, CO2, SO2, NO2, NO, etc gases. These gases are green house gases which cause environmental problems like global warming.

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15y ago

It is abput 70 percent of our air pollution

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14y ago

Internal combustion engines emit:

* carbon dioxide

* nitrogen oxides

* carbon monoxide

* unburned hydrocarbons

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10y ago

About 21% of smog is accounted to automobiles

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10y ago

The percentage of pollution that vehicles and engines contribute is 5 percent or less depending with the given area.

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9y ago

Transportation is the largest single source of air pollution in the United States. This air pollution carries significant risks for human health and the environment.

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13y ago

i dont know but probably half

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Q: What is the percentage of pollution that vehicles and engines contribute?
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