los angeles
Mexico city has terrible air quality. They are plagued by smog, as well as all types of chemicals in the air. This has given them a bad climate, and terrible air pollution.
The air quality in Mexico City is horrible.
Vehicles and heavy industry (steel, glass, textile and chemical plants are the worst offenders) are the top contributors to bad air quality in Mexico City.
The air quality in a busy city is typically poorer due to higher levels of pollution from traffic, industry, and human activity. In contrast, the air quality in a forest is usually cleaner and fresher, with higher levels of oxygen and lower levels of pollutants, as trees help filter the air and absorb pollutants. Forests also have a higher concentration of natural compounds that contribute to air quality, such as phytoncides.
The quality of the air in Delhi, India is regarded to be very poor. Some studies suggest that it is as bad as Beijing.
very bad
Jack Landau has written: 'City of Portland air quality handbook' -- subject(s): Air quality management, Air, Pollution
They have 10 tornadoes each day
Air quality in Tijuana can be problematic, often due to urban pollution, industrial emissions, and vehicle exhaust. The city frequently experiences high levels of particulate matter and ozone, especially during the dry season. While the situation can vary, residents and visitors should monitor local air quality reports, particularly if they have respiratory issues or are sensitive to pollution. Overall, the air quality is generally considered to be below optimal standards.
Mexico City holds that doubtful distinction.
"several times a day in all kinds of weather"
"several times a day in all kinds of weather"