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What did the Clean Air Act change after the Great Smog of London?

The Clean Air Act of 1956 created smoke-free areas in London and restricted coal burning in homes and industrial furnaces. The legislation, which was passed four years after the Great Smog of London, was a direct response to the crisis. Overall, the law helped speed London’s move toward cleaner-burning natural gas and electric motors for generating power, and it helped improve public health in Britain. It accomplished this by allowing homeowners to receive grants to change from coal to heating sources such as oil, natural gas, or electricity.