Tackling air pollution may accidentally trigger serious health issues
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World Health Organization
Lancaster University
the University of York
Texas A&M University
the University of Birmingham
Zhang
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PNAS
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Adam Vaughan
Imaginechina
PM2.5
Barbara Maher
Alastair Lewis
Renyi Zhang
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Beijing
PM2.5
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Summary
While most previous work on the subject has been lab-based, the researchers attempted to reflect the complex chemistry of city air with tests by a Beijing road, as well as within an enclosed chamber with a car running.They found high concentrations of PM2.5 in polluted air suppress the formation of ultrafine particles. Failure to do both at the same time could be “ineffective and can even exacerbate this problem”, the researchers say.“I’ve said before that great care is needed to avoid inadvertently worsening the situation by reducing the mass of airborne particulate matter, only to increase… the numbers and the toxicity of the ultrafine [particles] as a result,” says Barbara Maher at Lancaster University, UK, who wasn’t involved in the research.This doesn’t mean cities with a PM2.5 problem should give up tackling it, she says.
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