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- Ban Ki-moon greets Leonardo DiCaprio at the Paris Agreement Signing Ceremony. UN Photo/Eskinder Debebe
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- Getrude Clement, youth representative from Tanzania, addresses the opening ceremony. UN Photo/Rick Bajornas
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- Ban Ki-moon addresses the Opening Ceremony of the High-Level Event for the Signature of the Paris Agreement. UN Photo/Rick Bajornas
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- Ban Ki-moon addresses the Opening Ceremony of the High-Level Event for the Signature of the Paris Agreement. UN Photo/Rick Bajornas
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- Mr. Ban poses with three of the speakers who addressed the opening segment of the signature ceremony. From left: Hindou Oumarou Ibrahim (from Chad), civil society representative; UN Messenger of Peace Leonardo DiCaprio; Getrude Clement, 16-year-old Tanzanian youth representative. UN Photo/Mark Garten
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- Ban Ki-moon (top, second from left) meets with Dilma Rousseff (top left), President of Brazil. Segolene Royal, Climate Minister of France, is in the foreground left. UN Photo/Mark Garten
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- Ban Ki-moon meets Youth Representatives at the Paris Climate Agreement Signing Ceremony. UN Photo/Eskinder Debebe
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- Secretary-General Ban Ki-moon reviews notes before hosting a signing ceremony for the Paris Agreement on Climate Change on 22 April at the United Nations. UN Photo/Eskinder Debebe
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- Ban Ki-moon greets former US Vice President and climate activist Al Gore at the luncheon on 22 April. UN Photo/Eskinder Debebe
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- US Secretary of State John Kerry signs the Paris Agreement with his granddaughter on lap.
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- Secretary-General Ban Ki-moon (right) and President François Hollande of France brief the press. UN Photo/Eskinder Debebe
On 22 April, 175 Parties signed the Paris Agreement on Climate Change. Check out the photos from the event and behind the scenes of this busy, historic day.