EPA Reports Clean-Air Progress

After decades of pollution controls, smog tests and specially formulated fuels, it appears
that progress in clean air is being made. The Environmental Protection Agency (EPA) reports
that carbon monoxide levels are down 41 percent, lead is down by half, sulfur dioxide has
been reduced by 37 percent, and there is 19 percent less particulate matter. All this
progress has been made, even with a 143-percent increase in vehicle miles traveled during
the years in which the controls have been introduced.

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