Smog Hits A Record Low In 2004
"2004 has had the lowest ozone smog levels since states began measuring the stuff back in the 1970s. Based on preliminary data from around the country, days exceeding EPA's tough new 8-hour ozone standard declined an average of about 50 percent below 2003, which was itself a record year...
A combination of continuing emission reductions and favorable weather explains the improvements."
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