The impact of COVID-19 on manufacturing, travel and the associated pollutant production has proved an unexpected opportunity for a global experiment for atmospheric scientists. Drs Jenny Stavrakou and Maite Bauwens at the Royal Belgian Institute for Space Aeronomy are experts in atmospheric modelling and interpretation of satellite measurements of air pollution. They have been exploring how COVID-related changes have affected our environment and how we might use this to improve air quality in the future.