On the two-year anniversary of the Paris Accord, world leaders are gathering in the French capital for the "One Planet" summit to discuss stepping up efforts against global warming. CNN's Melissa Bell has more.
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Tue, 12/12/2017 - 2:04am
On the two-year anniversary of the Paris Accord, world leaders are gathering in the French capital for the "One Planet" summit to discuss stepping up efforts against global warming. CNN's Melissa Bell has more.