People living in cities from the late 1850s through at least the 1930s,often

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The burning of coal and other fuels for heating and transportation caused air pollution in cities, leading to respiratory diseases such as bronchitis and tuberculosis. Oil and natural gas fuels were not commonly used for electricity generation until later in the 20th century, and trains were typically powered by coal or steam engines. Wood was used for heating in early city development, but it was largely replaced by coal and other fossil fuels.

People Living in Cities from the Late 1850s Through at Least