Photo shows the stamp jointly issued by La Poste, France and the United Nations Postal Administration (UNPA) to commemorate the 21st United Nations Climate Change Conference, COP21. (Photo/unstamps.org)
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Photo shows the stamp jointly issued by La Poste, France and the United Nations Postal Administration (UNPA) to commemorate the 21st United Nations Climate Change Conference, COP21. (Photo/unstamps.org)
