Significant efforts are directed to improve urban air quality, but due to the complexity of the air pollution cocktail, these often come with unexpected and unwelcome side effects. The proportinal share of organic particle formation is on the rise due to , among other factors, increasing emissions of organic aerosol precursors, from both biological sources , and household chemicals We will uncover the future urban chemical cocktail by combining state-of-the-art molecular-level simulations on recently discovered aerosol-forming organic compounds, automated reaction mechanism generators, and high-resolution local scale air quality modelling. This will set a new standard for urban air quality studies. We will explore the changes caused by the ongoing inorganic-to-organic shift on key urban air quality parameters such as particle numbers, mass and size distributions, in selected case study cities.

2025