UNFCCC

“In 1992, countries joined an international treaty, the United Nations Framework Convention on Climate Change, to cooperatively consider what they could do to limit average global temperature increases and the resulting climate change, and to cope with whatever impacts were, by then, inevitable.” From the press release: “The new logo presents a new image that highlights the central theme of the Convention and the institutional linkage to the United Nations.” Thanks to Keenan Chadwick for the tip.