New York TimesEPA plans tightening of restrictions on smog-causing ozoneWashington PostThe Obama administration is expected to propose restrictions on smog-causing ozone on Wednesday in a move that will addresss a major cause of respiratory illness for millions of Americans while also setting the stage for new clashes with the ...Obama Set for Retry of Smog Rule Businesses Say May Be CostliestBloombergEPA To Propose Limit to Ozone Air Pollution Wednesday, Sources SayWall Street JournalAP sources: After tabling similar proposal, Obama to propose a stricter smog ...Minneapolis Star TribuneHouston Chronicle -San Antonio Express-News -The Guardianall 27 news articles »