President Barack Obama is hoping to marshal strong global action against climate change at the historic conference in Paris and reassure the world that the U.S. can deliver on its own commitments.

Obama is due to arrive in the French capital late Sunday.

He's joining more than 150 world leaders who are assembling for the opening days of a two-week conference. The countries are trying to negotiate an agreement aimed at avoiding a calamitous increase in global temperatures.

Obama — with just a year left in office — wants to lead the world by example on climate change. But he faces pushback at home that makes it harder for him to credibly make the case on the world stage that the U.S. will honor its promises to cut emissions.

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