Overlooked pollutants are responsible for about 15% of current global warming, study shows

In a new paper published in Science, leading scientists and climate policy experts show that 15% of current global warming (0.3°C) from human emissions stems from pollutants that fall outside most existing climate policy frameworks. Most of these overlooked pollutants are called "indirect greenhouse gases" and include carbon monoxide, non-methane volatile organic compounds, nitrogen oxides and molecular hydrogen.

source https://phys.org/news/2026-06-overlooked-pollutants-responsible-current-global.html