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In page Urban resilience:
"According to urban historian Roger W. Lotchin, World War II had a profound environmental impact on urban areas in the USA. By 1945, Pittsburgh and other cities along the Mississippi River experienced levels of air pollution that are comparable to the Dust Bowl.[citation needed] World War II more directly impacted many cities that were the site of battles and bombings, such as Hiroshima, Chongqing, Stalingrad, and Dresden.[1]
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