Ozone pollution is an escalating problem in Southeast Asia due to economic development, with NO x and VOCs being emitted by vehicles, factories, and power plants. As a tropical region, Southeast Asia also has a high level of natural VOC emissions from plants. Following current trajectories, annual ozone-related premature deaths in Southeast Asia could drop by 22,000 per year by 2050, thanks to planned NO x emissions reductions from power plants, factories and transport. The tropical conditions in Southeast Asia also make ozone formation different from that in other parts of the world,” said associate professor Steve Yim of NTU Singapore, lead author of the study. Our study shows that by taking decisive steps now, we can significantly reduce the region’s health burden and improve air quality.