The killer London smog event of December, 1952

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Sixty years ago this month (December), London was enveloped under a toxic mix of dense fog and sooty black smoke for four days. This episode of polluted air is among the deadliest environmental disasters in recorded history.

The event became known as the Great Smog of 1952. Over 4,000 more people died than usual for that time of year with an estimated 8,000 more fatalities in the following weeks from exposure to the noxious air pollution.

While not as deadly – and not as well-known - hundreds of deaths have been attributed directly to episodes of severe smog in the U.S. over the 60 intervening years - including three killer smog events in New York City....

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