Summary:
- The article discusses the threat of sinking cities in the Great Lakes region, which is an under-recognized issue.
- Many cities in the Great Lakes area, such as Chicago, Detroit, and Cleveland, are built on unstable soil and are at risk of sinking due to factors like groundwater depletion and urban development.
- Experts warn that this issue needs to be addressed to prevent significant damage to infrastructure and property, and to protect the communities living in these at-risk cities.