Alastair Lewis, a Professor of Atmospheric Chemistry at the University of York, shares expertise on improving indoor air quality. He discusses the serious health risks posed by mould, particularly for children with asthma. The conversation highlights a study by Imperial College examining indoor pollutants and the urgent need for effective mould management in homes. Alastair also emphasizes the importance of ventilation and the potential shift to electric cooking in reducing harmful emissions. Practical tips for maintaining cleaner air are provided throughout the discussion.