Which of the following statements best summarizes the effects of the London Fog of 1952?

The Great Smog of 1952 formed when pollution from widespread coal burning became trapped over London. It caused thousands of deaths—more than 4,000 in early estimates—and helped spur the British government to take air pollution more seriously, including passing the Clean Air Act of 1956. Therefore, the best summary is that coal-fire pollution caused deaths and changed the government’s outlook on pollution.

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