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Senators propose first US carbon tax

Senators Bernie Sanders and Al Franken attend the 2013 Green Inaugural Ball at NEWSEUM on January 20, 2013 in Washington, DC.US senators proposed a tax on carbon emissions Thursday amid growing calls for action on climate change, but the bill is expected to face strong opposition from conservatives. Two days after President Barack Obama urged Congress to tackle the emissions blamed for rising temperatures, two senators laid out a plan that would for the first time set a price on carbon throughout the United States.