I am working on global to regional atmospheric modelling of atmospheric particles and gases for more than fifteen years. My main research interest lies in the interactions of atmospheric particles and global and regional climate. My recent work focuses on how the natural particles such as dust, seasalt, and biological particles are emitted, transported and interact with radiation and clouds, thereby impacting the climate and how their source strengths change with changing climate. I am also working with the impacts of atmospheric particles on human health and the effects of different mitigation strategies on the impacts of particles on premature mortality in the future. I have been involved in large international projects focusing on short lived climate forcers and their impacts on air quality and climate, as well as on health impacts of air pollution and their economic valuation.