What does the term "Rust Belt" refer to?

The term "Rust Belt" refers to a region in the Northeastern and Midwestern United States that was once known for its thriving industrial and manufacturing centers. This area experienced significant economic decline due to deindustrialization, so-called "rust" referring to the decline of these once-bustling factories that produced steel, automobiles, and various goods. The Rust Belt encompasses cities like Detroit, Pittsburgh, and Cleveland, which were major hubs of manufacturing. The transition away from manufacturing in these areas has greatly impacted their economies, leading to job loss and urban decay, thus the term encapsulates both the industrial history and the economic challenges faced by these regions.