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Whenever we’re asked to mention a sinking city, it’s a fair bet that Venice is the place which comes to mind, yet parts of the center of Mexico City are sinking at an even faster rate than that of the old Italian lagoon city.
Mexico which is home to some 21 million people, that consume nearly 287 billion gallons of water each year, has sunk more than 32 feet in the last 60 years because 70 percent of the water on which people depend on is extracted from the aquifer below the city.

A very serious issue which is seen for a while is, many of Mexico City's buildings are seriously leaning because of the land subsidence.
The Aztec's weird choice of location for their fine city was just the start of the problems. The Spaniards when they took over in 1519, they filled in the lake and sank deep wells to bring water up from underground aquifers. "Everywhere they pumped up groundwater from the boreholes, the ground sank. Without the water there, the sediments that the city was built on compressed a lot more," says Eddie Bromhead, a geotechnical engineer at Kingston University.

The water table is sinking at a rate of 1 meter (3.2 feet) per year. As the city population is rising up and water demand is increasing, the problem will only get worse.
"It needs to be stopped because it's too late to be remedied," Noel said. "The city needs to find a way to figure out their water problem. They really need to look into alternatives like collecting rainwater, which makes so much sense in a city like this, which gets so much rainfall every year."

It's not only the Mexico City either. A recently conducted analysis found that 4 billion people—nearly two-thirds of the world population—are at risk as water tables drop all over the world.

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