To most people, air pollution comes from factories and car exhausts, but indoor air quality impacts – from smoke, paints, varnishes, and spores – are quickly becoming a bigger cause for concern. That’s according to an international team of researchers led by the University of Surrey, who claim the lack of real-time data on indoor air pollution is a major issue that leads to the millions of deaths every year. “It is essential that we are able to effectively monitor indoor air pollution so that we can better understand when and where levels are worst, and in turn offer solutions to make our air healthier,” said Dr Prashant Kumar of the University of Surrey.