Because Mexico City is 2,240 meters or 7,349 feet above sea level. Many people who are not accustomed to such heights find it difficult to breathe there.
because its hard to breathe thin air above earths surface, the higher you go its hard to breathe oxygen.
Hard to take in air
because the air is thinner the higher the altitude is.
About 381 air miles from Monterrey, Mexico to Mexico City.
The air quality in Mexico City is horrible.
It is very hard to breathe underwater without assistance from an air tank.
Air distance is approximately 3773 kilometers (2345 miles), between Seattle and Mexico City.
The air distance from Mexico City, Mexico, to New York City, New York, is 2,087 miles. That equals 3,358 kilometers or 1,813 nautical miles.
Mexico City holds that doubtful distinction.
The air distance from Sydney, Australia, to Mexico City, Mexico, is 8,062 miles. That equals 12,974 kilometers or 7,005 nautical miles.
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.
Air mileage from Springfield, Missouri, to Mexico City, Mexico, totals 1,273 miles. That equals 2,049 kilometers or 1,106 nautical miles.