Related: After Paris Attacks, Tenor of COP21 Climate Talks Might Change. Negotiating how to limit global warming may prove difficult; achieving a binding agreement will prove even harder.

COP21: Paris climate deal 'our best chance to save the planet', says Obama. Pledge would see 'acceptable' level of global warning cut to less than 2C, with 1.5C the aim ...

Editor’s Note: Be part of CNN’s COP21 coverage: We’d like to hear from you on how climate change could affect your local community. Upload your video here or tag #2degrees on Twitter ...

Mr. Xie Zhenhua, China’s special envoy to COP21 and head of the Chinese delegation told BBC News that the Paris agreement is a major step forward in global efforts to curb climate change.

In what supporters are calling a historic achievement, 196 parties attending the COP21 climate meetings outside Paris voted to adopt an agreement Saturday that covers both developed and developing ...

COP21: The Paris climate treaty is a long way from solving the problem but is still a genuine landmark. There is no guarantee it will effect the necessary cuts in emissions. Michael McCarthy.

Because France declared a state of emergency, public marches and demonstrations have officially been banned during COP21. ... At COP21, Victims of Paris Attack Mobilize for Climate Action.

World rallies for action against climate change 36 photos. PARIS --It sounds like English.Yet to the untrained ear some of the language used in the U.N. climate talks is about as comprehensible as ...

On Earth Day, global leaders will sign the COP21 Paris agreement, but this is why we need action, not just talk, says Gabon's president.

Who holds the cards at COP21?: Major players in Paris seem to agree carbon pricing is essential -- so why isn't it on the menu? Support is growing for the need to price fossil fuels to fight ...

The global climate change summit in Paris, COP21, is a pretty big deal, with a lot riding on what the 150 or so world leaders commit to for reducing greenhouse-gas emissions. Given what's at stake ...