What megacity in South America had been known for the worst air pollution?

According to new research, more than 5..5 million deaths are associated with polluted air. hope this : ).

Explosive eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. lahars, pyroclastic flows, ashfall, and many other volcanic hazards are commonly associated with explosive eruptions. explosive eruptions are very dangerous. basically, any form of hazard can occur.

His main goal was  the modernization and westernization of turkey