Share of T&T air pollution, by region and pollutant, 2024 Asia-Pacific contributed the majority of air pollution, and more than half the global total for PM2.5 (61%), PM10 (57%), and CO (55%). The Americas and Europe were also major contributors, while the Middle East and Africa contribute relatively small amounts across most pollutants, largely reflecting their smaller tourism markets. emissions peak, largely in-line with the recovery of their The second graph on the right shows NOx pollution, which was close to or above 2019 levels in all regions by 2024, with has been slower. Other pollutants follow similar trends.