The COP21 climate conference in Paris is underway, and some big names are promoting a global initiative that's pushing for a zero-emissions future.
U.S. President Barack Obama told delegates at the COP21 climate conference that "this is the moment we finally determine we would save our planet." in Paris on Monday.
Shortly after arriving in Paris, U.S. President Barack Obama visits the memorial at the Bataclan concert hall to pay tribute to the victims of the deadly Paris attacks. Rough Cut (no reporter narration).
President Obama faces two major battles as delegates meet in Paris this week to tackle climate change -- one with developing nations, and the other with Republicans in Congress. WSJ's Jerry Seib explains. Photo:AP