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Activist Isaac Bunn walks near his family's home in Braddock. His house is the only one left on the block near the Edgar Thomson steel mill. <br />
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The population of Pittsburgh, the urban area that Braddock is a part of, has halved since its 1960s high point. Like many of the so-called rust belt states, Pennsylvania's heavy industries have declined due to globalisation, automation and a move away from polluting industries. The resulting de-industrialisation has led to rising unemployment or wage stagnation, falling urban populations and rising inequality.