What does a city weigh?

By Allison Kubo Hutchison Noah Friedlander, San Francisco from the Marin Headlands in March 2019, CC BY-SA 4.0 As you walk the pavement of your city, the buildings rising around you, the impact of a city on the landscape is clear. It changes the skyline and the view. But how does it change the ground below? Does the weight of a city bend the crust below? Thirty years from now it is estimated that 70% of Earth's population will concentrate into high-density metropolitan regions most of which are ...