All buildings subside, because we can’t inject concrete and rebar down into the earth’s core. So long as they do so evenly (so not like the Tower of Pisa) it’s

All buildings subside, because we can’t inject concrete and rebar down into the earth’s core. So long as they do so evenly (so not like the Tower of Pisa) it’s not a massive problem. For alarming rates of ground subsidence, Mexico City subsides at 50cm a year and Jakarta at 25cm a year, due to excessive groundwater extraction.