Nearly Half of US Breathes Unhealthy Levels of Pollution—Cars and Trucks Largely to Blame
Union of Concerned Scientists
MAY 21, 2025
are formed indirectly in the atmosphere from other toxic pollutants also emitted from tailpipes. Here is a striking statement from the report: Short-term spikes in fine particle pollution that last from a few hours to a few days can kill. Internal combustion vehicles are largely to blame, since PM 2.5 is also deadly.
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