NEET BIOLOGY

Detailed explanation-1: -Perched 7, 300 feet above sea level in a valley wrapped round by mountains and volcanoes, Mexico City has long suffered from thick layers of smog produced by cars, factories, and wildfires. Among the worst hazards of that air pollution for its 21 million inhabitants is PM 2.5, inhalable fine particulate matter.

Detailed explanation-2: -These air pollutants are mostly generated from human activities such as burning fossil fuels in power plants and vehicle emissions. In the 80s, there were about 124 cars per 1, 000 residents. Although this number might not seem particularly high, these cars were made in poor quality and ran on very toxic fuel.

Detailed explanation-3: -Air Pollution in Mexico City has been of concern to the city’s population and health officials for decades. In the 20th century, Mexico City’s population rapidly increased as industrialization brought thousands of migrants from all over the world.