What are two main sources of air pollution in Mexico City?

Two main sources of air pollution in Mexico City are:

- Vehicle emissions: Mexico City has a high concentration of vehicles, including many older models that emit high levels of pollutants. In addition, traffic congestion and stop-and-go driving conditions contribute to increased emissions.

- Industrial emissions: The industrial sector in Mexico City is another significant source of air pollution. Many industries in the city, such as manufacturing plants, power plants, and refineries, release pollutants into the air, including chemicals, heavy metals, and particulate matter.