According to EPA, the levels of sulfur dioxide and nitrogen oxide would have been cut in half under the cross-state rule.
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2.
Originally scheduled to go into effect on January 1st, the rule would have required 27 upwind states to dramatically reduce sulfur dioxide and nitrogen oxide emissions by 2014.
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3.
The new rule required about half the states to reduce their emissions of sulphur dioxide, nitrogen oxide and other emissions based on projections of how many pollutants were crossing state lines, and told them how to do it.