Megacity traffic soot contributes to global warming

Source: Science Daily

Soot from road traffic in emerging countries can reach high altitudes, where it can be transported over long distances and thus contributes to global warming. The reduction of pollutants from road traffic such as soot particles from diesel cars should therefore have high priority in order to both protect the health of the population in the growing conurbations of emerging countries and reduce global warming.

https://www.sciencedaily.com/releases/2018/12/181213135703.htm