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UPPER MARLBORO, Md. — President Obama took another step to curb greenhouse gas pollution Tuesday without waiting for Congress, as he directed his administration to develop new regulations to reduce carbon emissions from the heavy-duty trucks that transport the nation’s goods.
Appearing in a grocery chain truck bay in this Washington suburb, the president said the Transportation Department and the Environmental Protection Agency would draft new fuel economy standards for trucks by March 2015 so that they could be completed a year after that as he rushes to put in place a new regulatory structure before leaving office.