Mexico City was built in a drained lake bed so the loose soils of the lake bed make earthquakes stronger and more damaging. The next one is mountains that surround the city trap in automobile exhaust and other pollutions that the city uses. Also mudslides and volcanoes.
It resides within a valley, which traps smog and exhaust fumes.
It sits on the bottom of a dessicated lake. This makes it vulnerable to earthquakes.
It is located at a high altitude (2240 m/7349 ft above sea level) which allows "thermal inversions" to occur; also lower oxygen levels due to altitude worsen smog problems, as incomplete combustion increases carbon monoxide (CO) levels.
It is situated at the bottom of a valley, surrounded by mountains and hills. This prevents strong winds to reach the city, resulting in a "cookpot effect" which allows for accumulation of toxic fumes (specially ozone and dirt particles) as well as thermal inversions during the winter months.
In one word: overpopulation.
This means, among many other things:
Mexico City is in Mexico.
Mexico City, Mexico
Mexico City is located on both the Northern and Western Hemispheres.
Mexico City, current capital of Mexico.
The Presidente Intercontinental is located in the city known as Mexico City. Mexico City is a city that can be found in the country known to the world as Mexico.
The city of Apatzingan is an ancient city located in Mexico, and is known for it's hot climate. The city of Apatzingan is located in the western-central area of Mexico.
The volcano is located in the Puebla state, southeast-central Mexico, west of the city of Puebla. Popocatepetl is the second highest volcano in Mexico, and is located 70 km (45 miles) southeast of Mexico City, and 45 km (30 miles) southwest of the city of Puebla.
In the country of Mexico.
It is now called Mexico City!
It is located on the northern, western hemispheres.
New Mexico, its a city.
In middle of mexico.