The San Francisco skyline in California, U.S.. (Photographer: David Paul Morris/Bloomberg)
(Bloomberg) -- In late 2020, engineers began working on a $100 million project to stop San Francisco’s Millennium Tower from tilting and sinking further into the ground. Tenants of the beleaguered luxury condo had learned four years earlier that the 58-story high-rise had sunk some 16 inches in over a decade. But the tower’s predicament is only part of a larger problem, and not just for the Bay Area: Cities around the world are sinki...