'You can choose whether to smoke, but you can't pick the air you breathe, even if it is contaminated by lead particles from automobile exhaust.''The next time you pull the family barge in for a fill-up, check it out: The gas pumps read "Unleaded." You might reasonably suppose this is because naturally occurring lead has been thoughtfully removed from the gasoline. But you would be wrong. There is no lead in gasoline unless somebody puts it there. And, a little more than seventy-five years ago, some of America's leading corporations--General Motors, Du Pont and Standard Oil of New Jersey (known nowadays as Exxon)--were that somebody. They got together and put lead, a known poison, into gasoline, for profit.'
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