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When roads heat up during the summer, the asphalt poisons urban air

8 Sep 2020

When roads get heated by the sun, asphalt can emit greater quantities of secondary organic aerosols than on-road gasoline and diesel vehicles combined.

In the summer, dark asphalt roads and roofs absorb heat from the sun and then put it back into the air, making cities get hotter and take longer to cool off, in what’s called the urban heat island effect. But that warmed-up asphalt, it turns out, isn’t just releasing heat: It’s also releasing harmful air pollutants, worsening the air quality in urban areas.


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This content was originally published by Fast Company. Original publishers retain all rights. It appears here for a limited time before automated archiving. By Fast Company

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