Climate Pledges Now Add Up to a 6% Emissions Cut by 2035

Global greenhouse gas emissions would fall 6 per cent below 2019 levels by 2035 if countries carry out the climate pledges they have filed, according to the 2026 Nationally Determined Contributions Synthesis Report that UN Climate Change published on 27 October 2026. If every conditional element is also delivered, the cut reaches 9 per cent.

The figure rests on 127 new nationally determined contributions representing 154 Parties to the Paris Agreement, submitted between 1 January 2024 and 31 August 2026. AFP reported that those submissions cover 71 per cent of global emissions.

Against the benchmark AFP cited, a cut of roughly 60 per cent from 2019 levels to hold warming to 1.5 degrees Celsius, the pledged reduction is about a tenth of what is required. It is also lower than the UN's own estimate a year ago of 10 per cent. AFP attributed the drop to two things: that earlier figure was modelled while most pledges were missing, and the United States has since been removed from the calculation after leaving the Paris Agreement for a second time.

Where 1.7 to 2.3 degrees comes from

Most new pledges are tied to long-run decarbonisation targets, with net zero dates between 2040 and 2070 and the majority on 2050. Taken with those commitments, the report puts best-estimate warming at 1.7 to 2.3 degrees Celsius by the end of the century, adding that "returning warming to 1.5 degrees Celsius would require substantial additional GHG emission reductions in the coming years". The UN Environment Programme put the world on course for 2.6 degrees in its emissions gap report last week.

The 2035 date is the one European governments are renegotiating in public. As Parallax Nexus has reported, a joint Franco-German position published on 16 October would cut the EU's 2035 car fleet target to 90 per cent and drop the obligation to offset the rest. The synthesis counts pledges as filed, not as they may be amended.

The other number published the same morning

In Geneva the same day, the World Meteorological Organization released its Greenhouse Gas Bulletin. The globally averaged surface concentration of carbon dioxide in 2025 was 426.8 parts per million, which the WMO puts at 153 per cent of the 1750 pre-industrial baseline. Methane reached 1,948 parts per billion, or 267 per cent of that baseline, and nitrous oxide 339.1 parts per billion, or 126 per cent. When the WMO published its first bulletin in 2004 the carbon dioxide figure was 377.5 parts per million.

Carbon dioxide rose 2.8 parts per million between 2024 and 2025, above an annual increase that has tripled since the 1960s, from 0.8 parts per million a year then to 2.4 in the decade from 2011 to 2020. Oksana Tarasova, a WMO senior scientific officer, tied the smaller 2025 rise to recovering land carbon sinks and fewer fire emissions after the 2023 and 2024 El Niño, and said the agency expects "a further increase in concentrations in 2026 because of fossil fuel burning and the development of a powerful El Niño which will impact land carbon sinks as it did in 2023/2024".

Two caveats hold. The synthesis covers 71 per cent of global emissions, so the headline percentage is sensitive to which governments filed, and the bulletin measures what has accumulated in the atmosphere rather than what was emitted in any one year.

The honest reading is that the synthesis report has stopped being a scoreboard of ambition and become a record of attrition. A number that fell from 10 per cent to 6 per cent largely because one large emitter walked out tells negotiators arriving in Antalya on 9 November less about what is possible than about how little the architecture can absorb. UN Climate Change notes, accurately, that the new pledges reach deeper into economies, with local authorities, civil society and private firms now involved in monitoring. That is a change in institutional texture, not in the concentration curve.