Once upon a time, you could touch the air in New York. It was that filthy. No sensible person would put a toe in most of the waterways.
In 1964, Albert Butzel moved to New York City, which then had the worst air pollution among big cities in the United States.
“I not only saw the pollution, I wiped it off my windowsills,” Mr. Butzel, 78, an environmental lawyer, said. “You’d look at the horizon and it would be yellowish. It was business as normal.”
The dawning of envi
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