Dr Hancheng Dai’s expertise lies in environmental and climate policy research with integrated assessment model dedicated to addressing key scientific challenges and policy imperatives crucial for facilitating green and low-carbon transitions. Central to his investigations are questions surrounding the mitigation costs associated with ambitious climate targets and their co-benefits, particularly in terms of improvements in air pollution, human health, and resource efficiency. Notably, he has been recognized as one of the World’s Top 2% most-cited scientists from 2020 to 2023. His contributions extend to serving as the Lead Author of GEO-7 and Contributing Author of IPCC AR6.