Michael sits down this week with Lauri Myllyvirta, co-founder and lead analyst at CREA - the Centre for Research on Energy and Clean Air. After working as a campaigner and then as an analyst at Greenpeace, Lauri helped set up CREA, an NGO that produces research reports on the trends, causes, health impacts, and solutions to air pollution. Importantly, CREA makes extensive reference to local-language evidence sources - helped by Lauri's impressive knowledge of European and Asian languages.