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The U.S. Justice Department is suing to block Vermont's Climate Superfund Act.

Federal lawyers argue the act is unconstitutional and infringes on federal authority over energy and emissions.

Vermont officials maintain the law is a valid exercise of the state's power to protect its environment.

Federal lawyers want a judge to throw out Vermont’s Climate Superfund Act , a first-in-the-nation law requiring major polluters to pay the state for emissions.

The U.S. Justice Department asked Judge Mary Kay Lanthier last week to “end Vermont’s lawless experiment” in a motion for summary judgment , the latest in a lawsuit against the state over the act. The law, passed last year, aims to pool money from polluters into a fund for climate recovery projects.

In the May 1

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