SI

How can we reduce global methane release by 80% in the next 20 years?

Organizations

Carbon Mapper Coalition

nonprofit

EFFECTIVENESS ASSESSMENT: HIGH IMPACT on detection, emerging on abatement. Tanager-1 satellite (launched Aug 2024) has delivered 2,000+ methane plume detections worldwide. Key finding: 25% of emissions sources at O&G facilities are recurrent — meaning detection can drive sustained accountability. Notable finds include a Karachi landfill at 1,200 kg CH4/hr, 13 plumes in Turkmenistan at 78 tons/hr combined, and 4 Brazilian landfills emitting 7% of Brazil's entire reported waste methane. Detections have 'already led to successful emissions abatement' though specific cases aren't detailed. The technology works; the question is whether detection translates to sustained action.

Pasadena, USA

Clean Air Task Force (CATF)

nonprofit

EFFECTIVENESS ASSESSMENT: HIGH IMPACT on regulation, harder to quantify on emissions. Concrete regulatory wins: instrumental in finalizing US EPA O&G methane standards and methane fee; helped Ghana pass its first petroleum methane regulations (2025); co-leading FFRP to support 20 countries with regulation design. The #CutMethaneEU OGI camera campaigns (250 leaks documented in 11 countries) created powerful visual evidence that influenced EU Methane Regulation. Impact is primarily through policy wins and building regulatory capacity — the 'first mover' organization that sounds alarms others then act on. Waste methane program exists but impact metrics unavailable.

Boston, USA

Climate & Clean Air Coalition (CCAC)

agency

EFFECTIVENESS ASSESSMENT: MIXED — high activity, weak on measurable outcomes. Since 2022: $51M committed across 196 projects, 91 countries receiving support, 153 national strategies adopted. But the annual report provides NO quantified emissions reductions achieved. The Super Pollutant Country Action Accelerator needs $150M and isn't funded yet. Real strength is as a convener and policy framework provider (100+ country partners, 104 non-state partners) — but the gap between 'strategies adopted' and 'emissions actually reduced' is undefined and likely enormous. MR2R (launched Oct 2025) is too new to assess.

Paris, France (UNEP)

Climate Policy Initiative (CPI)

nonprofit

Research organization that produced the definitive Landscape of Methane Abatement Finance analysis, revealing methane finance is less than 2% of climate finance. Key knowledge resource for the finance dimension.

San Francisco, USA

DSM-Firmenich

company

EFFECTIVENESS ASSESSMENT: HIGH COMMERCIAL IMPACT — the leading private-sector innovator. Bovaer (3-NOP) is now approved in 70+ countries including FDA approval in the US. Demonstrates 30% methane reduction in dairy cows, 45% in beef cattle. The first commercially viable enteric methane solution at scale. Key limitation: cost and delivery logistics for smallholder farmers (hundreds of millions globally) remain unsolved — Bovaer works for industrial-scale operations but not yet for the farmers who collectively produce most agricultural methane.

Kaiseraugst, Switzerland

Environmental Defense Fund (EDF)

nonprofit

EFFECTIVENESS ASSESSMENT: HIGH IMPACT — the most consequential single actor in the methane space. MethaneSAT delivered groundbreaking data showing US O&G methane emissions are 4x higher than EPA estimates and 8x greater than industry targets — fundamentally changing the evidence base. 'Pledges to Progress 2025' report (with IEA/UNEP) created the first independent accountability framework: companies average 9/25 on transparency metrics, only 7 have credible plans, 20 scored less than 3/25. This accountability infrastructure is genuinely moving the field. Dairy methane work (Bel Group, Lactalis disclosures) is pioneering but small-scale. Revenue ~$383M (2023). Key risk: MethaneSAT lost contact June 2025 after 12 months — successor needed.

New York, USA

Global Methane Hub

nonprofit

EFFECTIVENESS ASSESSMENT: STRONG as funder coordinator, UNCLEAR as impact multiplier. Raised $500M+ from 20+ philanthropies, regranted $250M to 100+ grantees in 152 countries, claims to have catalyzed $10B+ in project investments. The $300M Data to Action campaign and $10M to CCAC are significant. But the 'catalyzed $10B' claim is hard to verify — what's the counterfactual? The Hub is genuinely the only philanthropic coordination mechanism for methane, making it structurally important. However, it operates primarily as a pass-through rather than a strategic capital orchestrator — it moves money but doesn't architect capital flows across diverse instrument types.

Washington DC, USA

Global Methane Initiative (GMI)

agency

20-year-old global public-private partnership advancing technical understanding of methane mitigation across all sectors. Hosts the Global Methane Forum. Focuses on technical capacity rather than advocacy.

Washington DC, USA

Global Research Alliance on Agricultural Greenhouse Gases

research_lab

Research coordination network with 60+ researchers from 46 institutions across 23 countries. Runs the Feed & Nutrition Network flagship project on methane-reducing feed additives. The primary international scientific coordination body for agricultural methane.

Wellington, New Zealand (secretariat)

Good Food Institute (GFI)

nonprofit

Nonprofit accelerating alternative protein innovation — plant-based, cultivated, and fermentation-derived. While not methane-focused per se, alternative proteins are a structural demand-side intervention that reduces livestock methane by reducing the number of ruminants needed.

Washington DC, USA

Institute for Governance and Sustainable Development (IGSD)

nonprofit

Policy research organization focused on fast-acting climate mitigation through short-lived climate pollutants including methane. Provides governance and legal frameworks for methane regulation. Key intellectual resource for the regulatory dimension.

Washington DC, USA

Rocky Mountain Institute (RMI)

nonprofit

EFFECTIVENESS ASSESSMENT: IMPORTANT DATA PROVIDER, EARLY-STAGE on waste impact. WasteMAP tracks 3,000+ methane plumes from disposal sites and provides city-level and site-level decision support tools. The platform is genuinely useful for identifying waste methane hotspots. Published a waste methane playbook for municipalities. But no evidence yet of WasteMAP data leading to actual emissions reductions at any specific site or city — it's a knowledge infrastructure, not yet an action infrastructure. The waste sector work is pre-impact: tools exist but adoption and action are the bottleneck.

Boulder, USA

UNEP International Methane Emissions Observatory (IMEO)

agency

EFFECTIVENESS ASSESSMENT: CRITICAL INFRASTRUCTURE, but with a massive response gap. MARS has issued 3,500+ satellite alerts across 33 countries — genuinely revolutionary detection capability. But only 1% of alerts received any response in early operation, rising to 12% more recently. 19 confirmed mitigation cases (52 metric tons/hour combined). OGMP 2.0 has 140 members covering 42% of global production; 55 companies achieved Gold Standard reporting in 2024. The Eye on Methane data platform is a genuine public good. The core problem: IMEO can see the emissions but cannot make anyone act. Detection without enforcement is insufficient — this is the single biggest gap in the monitoring infrastructure.

Paris, France (UNEP)

World Resources Institute (WRI)

nonprofit

Global research organization with significant methane work spanning agricultural methane reduction research (6 pathways analysis), food systems transformation, and climate policy. Bridges research and policy across sectors.

Washington DC, USA