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  • *"Americans may think smog was invented in Los Angeles. Not so. In fact, a Londoner coined the term "smog" in 1905 to describe the city's insidious combination of natural fog and coal smoke. By then, the phenomenon was part of London history, and dirty, acrid smoke-filled "pea-soupers" were as familiar to Londoners as Big Ben and Westminster Abby. The smog even invaded the world of Shakespeare, whose witches in Macbeth chant, "fair is foul, and foul is fair: Hover through the fog and filthy air."

    Smog in London predates Shakespeare by four centuries. Until the 12th century, most Londoners burned wood for fuel. But as the city grew and the forests shrank, wood became scarce and increasingly expensive. Large deposits of "sea-coal" off the northeast coast provided a cheap alternative. Soon, Londoners were burning the soft, bituminous coal to heat their homes and fuel their factories. Sea-coal was plentiful, but it didn't burn efficiently. A lot of its energy was spent making smoke, not heat. Coal smoke drifting through thousands of London chimneys combined with clean natural fog to make smog. If the weather conditions were right, it would last for days."*

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