With a population of 9.2 million, Mexico City is the largest populated city in North America. There are increasing concerns about the fact the city is sinking, with that parts of the city sinking between 40 cm (16 inches) and 50 cm (20 inches) a year.
The sinking is a result of the emptying of the water aquifers beneath the city over the centuries that has caused the clay beneath the city to compress.
Though restrictions were put on the amount of water that could be taken from the aquifer in the 1950s, the continued sinking has the potential to cause massive damage to the city’s infrastructure and could also lead to water shortages as the aquifer continues to compress.
Science Alert reports:
Scientists first noticed Mexico City was sinking in the early 1900s, at a rate of roughly 8 centimeters a year. By 1958, that had jumped to 29 centimeters a year, which led to a decision to cap the amount of water that could be brought up from wells in the city center.
After that, the rate of sinking returned to less than 9 centimeters a year, but in the past two decades, higher resolution data has revealed a consistent rate of up to 40 centimeters a year in the city’s historic downtown.
Using modern data, researchers now estimate the clay sheets underneath Mexico City could ultimately compress by 30 percent, and while that won’t happen for another 150 years or so, there’s little we can do to stop it.
Of course, the climate change fanatics are quick to blame any catastrophe (real or imagined) on man-made climate change. But as noted in the article, the city has been sinking since the early 1900s. READ: Mexico City Is Sinking Fast — and climate change is to blame
When it comes to sinking cities, Venice has always been the lead story. But in comparison, it is only sinking 1 to 2 millimeters a year (0.04 to 0.08 inches). READ: Venice Menace: Famed City is Sinking & Tilting