The chemistry of the gases and particles present in the air around is hugely important area of research. We require a detailed understanding of atmospheric chemistry to enable new pathways to reduce air pollution and climate change. To study this topic requires an approach that combines fundamental laboratory studies on the physico-chemical properties of atmospheric constituents with observations of the abundance and variability of these moities and numerical model simulations that integrate our understanding of the sources and fate of these compounds and with which we can test hypothesis on how they will change under different conditions. In the Archibald team we combine these three approaches to enhance our understanding of the air around us.