The largest increase was seen for NOx, which increased by 1.0 percentage points (pp) between 2023 and 2024 to 11.4% of global However, T&T's share of global air pollution remained below its 2019 peak for all pollutants aside from carbon monoxide (Co), which just By mass, T&T generates the most emissions of Carbon Monoxide, primarily through its value chain. CO is commonly produced in industrial facilities and by transportation. However, the global levels of CO emissions are higher than for other pollutants, so T&T's contribution to the global total is relatively low (3.5%). harms of these air pollutants. Although the estimates are presented footprint across the different pollutants, nor Aggregate across the six types of pollutants.