‘Pea soup’ smogs are a thing of the past, but now an ‘invisible killer’ lurks in London’s air - responsible for thousands of premature deaths each year. Through the use of masks, magnets, Lego and ultrafine particulate diffusion charging, we will make the invisible visible. We will explain how air pollution is measured, what’s it’s made of and how we can all take steps to reduce our exposure as we travel around the city.

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Item date 21/04/2016