Publications
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Briefings
Small island states and the least developed countries have called for warming to be brought back to below 1.5° by 2100. The 1.5°C warming limit is now under review for consideration next year by the UNFCCC.

Briefings
In this update the Climate Action Tracker has conducted a new analysis of the IPCC AR5 emissions database to evaluate the required level of global and regional action for 2020, 2025 and 2030 to limit warming to below 2°C or 1.5°C with a likely (66%) and high (85%) probability.

Peer-reviewed Papers
Climate sensitivity, the long-term temperature response to CO2, has been notoriously difficult to constrain until today.

Reports
This report analysis how the 2°C goal has affected global climate ambition and makes the case for increasing this goal to 1.5°C due to the projected increased severity of climate impacts and the required ambition to counter the speed of climate change.

Briefings
While the official UNFCCC negotiations made some limited progress, encouraging developments on the margins give hope that faster progress is possible.