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EPA sets tighter standards for soot pollution

Thursday, June 14, 2012 | 9:07 p.m. CDT; updated 10:14 p.m. CDT, Thursday, June 14, 2012

WASHINGTON — Responding to a lawsuit filed against it by 11 states, the Environmental Protection Agency is proposing new air quality standards to lower the amount of soot that can be released into the air.

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