Treaty secretariat
Appears in 2 stories
Tracks national pledges; projects 2.3–2.7°C under current commitments
The scenario long used as climate change's 'business as usual' no longer counts. In April 2026, the team building the next generation of global climate models removed SSP5-8.5 — the high-emissions track behind most '4-5°C by 2100' headlines — from the CMIP7 framework that will feed the IPCC's seventh assessment report.
Updated 6 days ago
Losing its largest historical emitter and second-largest economy
President Trump signed a memorandum on January 7, 2026, directing withdrawal from the UN Framework Convention on Climate Change—the 1992 treaty that George H.W. Bush signed and the Senate unanimously ratified. The US becomes the first of 198 parties ever to leave the foundational climate treaty. Unlike the Paris Agreement, which Trump also exited, the UNFCCC is the parent treaty underpinning all international climate negotiations. Withdrawal takes effect one year from notification.
Updated Jan 8
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