According to the U.N.'s panel on climate change, some of these islands could be almost completely covered in water by 2100.

Small Island Nations Push For Action On Climate Change

US President Barack Obama (3rd L) poses with Barbados Prime Minister Freundel Stuart (L), Kiribati President Anote Tong (2nd L), Mashall Islands President Christopher Loeak (3rd R), Papua New Guinea Prime Minister Peter O'Neil (2nd R) and St. Lucia Prime Minister Kenny Anthony (R) during a photo for the small island nations multilateral meeting at the Organization for Economic Co-Operation and Development Centre in Paris, on December 1, 2015.  (Jim Watson/AFP/Getty Images)

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Environment

Politics

Our coverage of the COP21 World Climate Summit held near Paris from Nov. 30 until Dec. 11. 

Paris Climate Talks

policy

Wrapping up his two-day trip, President Obama said he's \"convinced that we're going to get big things done here.\"

Obama Leaves Paris Climate Talks Confident Of Deal

U.S. President Barack Obama speaks during a press conference in Paris, France, on December 1, 2015. (Pascal Le Segretain/Getty Images)

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President Barack Obama and Chinese President Xi Jinping met on the sidelines of the talks to discuss efforts to combat climate change.

World Leaders Pledge To Make Progress At Climate Talks

U.S. President Barack Obama, left, shakes hands with Chinese President Xi Jinping during their meeting held on the sidelines of the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015. (Evan Vucci/AP Photo)

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Alden Meyer of the Union of Concerned Scientists explains the key issues, as leaders from more than 190 nations prepare to gather.

What To Expect At The Paris Climate Summit

Workers install a wind turbine on the Champs-Elysees avenue on November 26, 2015 in Paris, ahead of the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21/CMP11), also known as "Paris 2015" from November 30 to December 11.  (Patrick Kovarik/AFP/Getty Images)

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The negotiations will go on as planned, but authorities have banned public demonstrations in hard-to-secure outdoor spaces.

After Paris Attacks, Protests At Upcoming Climate Talks Curtailed

French gendarmes stand guard as dozens of people begin to gather for a demonstration in support of migrants at Place de la Republique (Republic Square) in Paris amid a ban on public gatherings on November 22, 2015. Paris has extended a ban on public gatherings introduced after the terror attacks in the French capital until November 30, the start of UN climate talks, the city's police headquarters said on November 21. (Loic Venance/AFP/Getty Images)