Global emissions have to decline with ​Immediate action
​by 2025 for 1.5°C AND 2°C limits (1.5°C now way too late)
(IPCC 6th Assessment, WG3, SPM C.1)

UNEP​ Climate Emergency 

Climate Emergency Institute
AGU 2024 Town Hall Presentation
​(American Geophysical Union) annual conference
                               Global Warming is Accelerating (confirmed 6 March 2026, Foster, Rhamstorf)
May 2025 was the 21st month in a 22-month period for which the global warming above  1.5°C The run was broken by June 2025.

2024 was the global warming record year at 1.55°C
2023 was 1.45°C and 2025 1.47°C​ (Copernicus)
Atmospheric greenhouse gas concentration (CO2 eq.) drives global warming.
It is record high (519 ppm CO2eq) and accelerating 
​
CO2 is responsible for about two thirds of global heating and all the ocean acidification.  
Mitigation

​​IPCC AR6
For the 1.5°C limit and for the 2°C limit
​global GHG emissions decline by
​2025 at the latest, with immediate action
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GLOBAL GHG EMISSIONS
​2024 Global CO2 equivalent emissions- (of CO2 and the other main greenhouse gases all together) are record high (519 ppm CO2 eq.)
First Response: The Fossil Fuel Treaty
Global temperatures from the past three years (2023-2025) averaged more than 1.5°C above the pre-industrial level (1850–1900). This marks the first time a three-year period has exceeded the 1.5°C limit. Air temperature over global land areas was second warmest, whilst the Antarctic saw its warmest annual temperature on record and the Arctic its 2nd warmest (Copernicus)

​​The 1.5°C danger limit is broken, and 2°C is being broken, which James Hansen 
says will be in the 2030s, not 2050 (as IPCC)
​​
Global Warming Is Accelerating (confirmed March 2026 Foster, Rahmstorf)
Accelerating global temperature
​and atmospheric GHGs
IPCC AR6 Mitigation projections