For a week at the beginning of December 1952, London was under a blanket of deadly smog. As a result, the Clean Air Act came into force a few years later banning smoky sulphurous fuels. However air pollution researchers are now concerned that rising emissions from wood burners may be undoing many of the gains from the Clean Air Act. We hear from Dr Gary Fuller, air pollution scientist at Imperial College London and author of The Invisible Killer, the Rising Global Threat of Air Pollution and How We can Fight Back. We also discuss emissions we can’t see, bacteria and even microplastics which are now present in the air. Catherine Rolph from the Open University tells us where we might find them.And we reveal the winner of the Royal Society Insight Investment Science Book Prize. You can find interviews with all the shortlisted authors in our previous programmes.BBC Inside Science is produced in partnership with the Open University.

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