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Air pollution exposure is shifting from outdoor to indoor – here's why

By Nicola Carslaw, Professor, Indoor Air Chemistry, University of York
David Carslaw, Reader, Chemistry, University of York

You may have seen the before-and-after-lockdown photos of major cities that appear to show dramatic changes in air quality. In one, the India Gate war memorial in New Delhi is barely visible amid the smog. Then, during lockdown, it’s clearly visible in its red Bharatpur stone grandness.

Getting vehicles off the road may do wonders for smog, but there’s more…

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