NEET BIOLOGY

Detailed explanation-1: -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-2: -What is the main source of air pollution in Mexico City? Vehicles represent a major source of air pollution in Mexico City. The automotive fleet includes a large group of vehicles propelled by the combustion of hydrocarbons (fossil fuels) and include mopeds, cars and trucks.

Detailed explanation-3: -Population growth, increasing motorization and industrial activities, a constrained basin and intense solar radiation combined to cause intense air-quality problems of both primary and secondary pollutants.

Detailed explanation-4: -There are multiple sources of air pollution in Mexico City that have combined to result in its low air quality. Main sources are vehicle volume, manufacturing and industrial processes, garbage burning, mass populations, and land formation.

Detailed explanation-5: -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.