Ask a Scientist: UCS Transportation Program Adds Equitable Mobility to its Portfolio
Union of Concerned Scientists
MARCH 12, 2024
Thanks largely to the Clean Air Act, new passenger vehicles are 98 to 99 percent cleaner than they were 60 years ago when it comes to most tailpipe pollutants, including hydrocarbons, carbon monoxide, nitrogen oxides, and fine particulate matter. Tailpipe pollution also is a major contributor to the climate crisis.
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