Methane Pledges
The Global Methane Pledge — launched at COP26 in November 2021 — commits signatories to a collective 30% reduction in methane emissions by 2030 from 2020 levels. Over 150 countries have joined, covering ~50% of global anthropogenic methane emissions. Major emitters absent: China, India, Russia. Achievement requires action across oil and gas, agriculture (especially livestock and rice), and waste management.
Key insights
Methane has unique near-term leverage
Methane has 80× the warming potential of CO₂ over 20 years (28× over 100 years) but breaks down in the atmosphere in ~12 years. This means reducing methane emissions today produces near-term cooling — buying time for slower CO₂ mitigation. IEA modeling suggests achieving the 30% reduction would avoid ~0.2°C of warming by 2050 — substantial relative to other available short-term interventions.
Oil and gas methane has the lowest-cost abatement
IEA estimates that about 70% of oil and gas methane emissions can be abated at zero net cost — captured gas has positive sale value. Yet leakage continues because monitoring is poor, regulation is lax, and operators internalize little of the social cost. EU methane regulation (2024) sets monitoring/repair requirements for EU operators; US EPA methane rules (2024) reinstated and expanded. Both establish floors but enforcement is the binding constraint.
Agricultural methane is harder
Livestock enteric fermentation (cow burps, primarily) and rice paddies are the largest agricultural methane sources. Reductions are technically possible (Bovaer feed additive, alternate wetting/drying for rice, herd-size optimization) but require farmer-level behavior change at vast scale. Production-decrease pathways (less beef, less rice) are politically charged. Most countries have no national strategy for agricultural methane reduction beyond efficiency improvements.
Global anthropogenic methane emissions by source (2023)
Mt CH₄ per year
Key Finding: Agriculture is the largest anthropogenic source; oil and gas is the largest opportunity for low-cost abatement.
Global methane emissions 2000–2030 (with pledge)
Mt CH₄ per year
Key Finding: Current trajectory shows growth; achieving the 30% pledge would require a sharp reversal.
Methodology & caveats
Methane measurement
Methane emissions are measured top-down (atmospheric concentrations from satellites: MethaneSAT, GHGSat, TROPOMI, Sentinel-5P) and bottom-up (inventories from emissions factors × activity data). The two often diverge — satellite observations consistently show more methane than inventories report. Recent satellite data has identified 'super-emitter' sites (specific oil and gas facilities, landfills) responsible for outsized share of emissions.
Why the Pledge isn't binding
The Global Methane Pledge is a political commitment, not a treaty. There are no enforcement mechanisms or country-level targets. Aggregate 30% reduction must come from sum of voluntary national actions. Track record so far: signatories' combined emissions have continued rising. EU and US have legislated specific oil-and-gas standards; most other signatories have not.
China, India, Russia absence
China is the largest single anthropogenic methane emitter (mostly coal and rice paddy). It has its own methane action plan but didn't join the Pledge. India is second-largest agricultural methane emitter (livestock-heavy) — joining the Pledge would constrain political space around the dairy sector. Russia (oil and gas, plus permafrost) faces sanctions and isn't in international climate fora. The three together hold ~40% of global anthropogenic methane.