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by weberer
857 days ago
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The USA actually has pretty strict emissions standards for diesel engines, so most cars on the road are relatively clean burning gasoline cars. But in parts of Europe or Asia, diesel vehicles are much more common, and their exhaust has a distinct smell from the sulfur and nitrogen oxides they produce. |
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If by that you mean bad smelling poorly running clunkers everywhere then yes. But mostly because we don't do emissions testing at all outside of one or two cities in my state.