🗞️ Why in News New satellite-based monitoring by MethaneSAT and other instruments has identified over 1,000 methane super-emitting events at oil and gas facilities worldwide, with Turkmenistan leading with 184 events — raising questions about accountability in the Global Methane Pledge.
The Methane Emergency
Methane (CH₄) is the second most important greenhouse gas after CO₂, but its near-term climate impact is far greater:
| Property | CO₂ | Methane |
|---|---|---|
| Atmospheric lifetime | ~300-1,000 years | ~12 years |
| Global Warming Potential (20-year) | 1x | 80x |
| Global Warming Potential (100-year) | 1x | 28x |
| Contribution to warming since 1750 | ~66% | ~25% |
Because methane is short-lived but potent, cutting methane emissions is the single fastest way to slow near-term warming. The Global Methane Pledge (COP26, Glasgow, 2021) committed 150+ countries to reducing methane emissions by 30% from 2020 levels by 2030.
Satellite Detection: A Game Changer
Until recently, methane emissions were estimated using bottom-up inventories — essentially self-reported data from countries and companies. Satellites have changed this fundamentally:
| Satellite/Instrument | Operator | Capability |
|---|---|---|
| MethaneSAT | EDF (Environmental Defense Fund) | Maps methane across oil/gas basins at 100m resolution |
| GHGSat | Private (Canada) | Point-source detection at 25m resolution |
| EMIT | NASA | Identifies super-emitters globally |
| Tanager-1 | Carbon Mapper | Quantifies individual point sources |
| Tango-Carbon | ESA (planned 2026 launch) | Area flux mapping at 300m |
The key finding: Turkmenistan dominates the global “Top 25” methane super-emitters, with emissions from aging Soviet-era oil and gas infrastructure. The country had 184 out of 1,005 detected super-emitting events — releasing methane at rates of 3.7 to 10.5 tonnes per hour.
Why This Matters for India
India is the 5th largest methane emitter globally, though India’s sources are primarily:
- Agriculture: Rice paddies (anaerobic decomposition) and livestock (enteric fermentation) — ~50% of India’s methane
- Waste: Landfills and open dumping — ~20%
- Energy: Coal mines and natural gas systems — ~30%
India did not sign the Global Methane Pledge at COP26, arguing that its per capita emissions are low and that methane from agriculture is fundamentally different from industrial methane leaks.
The editorial argues this distinction is scientifically valid but strategically risky — as satellite monitoring makes all emissions transparent, India’s agricultural methane will face increasing scrutiny regardless of its source.
Policy Recommendations
- Support satellite transparency: India should endorse open satellite methane data rather than opposing it — transparency helps identify fixable leaks
- Target low-hanging fruit: Coal mine methane capture and landfill methane recovery are technically feasible and economically viable
- Rice cultivation reform: Alternate Wetting and Drying (AWD) reduces rice paddy methane by 30-50% without yield loss — needs wider adoption
- Livestock management: Feed additives (e.g., Asparagopsis seaweed) can reduce enteric methane by up to 80%
- National Methane Action Plan: India needs a specific methane mitigation strategy beyond the general NDC commitments
UPSC Relevance
Prelims: Methane GWP, Global Methane Pledge, MethaneSAT, EMIT, methane sources. Mains GS-3: Climate change mitigation, satellite monitoring technology, methane and agriculture, India’s climate commitments vs. agricultural realities. Essay: “When satellites reveal what nations hide, transparency becomes the most powerful climate tool.”
📌 Facts Corner — Knowledgepedia
Methane Facts:
- 2nd most important GHG after CO₂
- GWP (20-year): 80x CO₂
- Atmospheric lifetime: ~12 years
- Contribution to warming: ~25% since 1750
- India: 5th largest methane emitter globally
Global Methane Pledge:
- Launched: COP26, Glasgow (November 2021)
- Target: 30% reduction from 2020 levels by 2030
- Signatories: 150+ countries
- India: Did NOT sign (argued per capita emissions are low)
- Top 3 emitters: China, Russia, USA
Satellite Monitoring:
- MethaneSAT: EDF; maps oil/gas basins globally
- GHGSat: Private (Canada); 25m resolution point sources
- EMIT: NASA; super-emitter identification
- Turkmenistan: 184/1,005 detected super-emitting events
India’s Methane Sources:
- Agriculture (rice + livestock): ~50%
- Waste (landfills + open dumps): ~20%
- Energy (coal mines + gas): ~30%
Other Relevant Facts:
- Alternate Wetting and Drying (AWD): Reduces rice paddy methane by 30-50%
- India’s NDC: Net-zero by 2070; 50% non-fossil power by 2030
- Harit Dhara (anti-methanogenic feed supplement): ICAR innovation to cut livestock methane
- Coal Mine Methane: India has ~1,200 coal mines; methane capture technology available but underdeployed
- Paris Agreement Article 4: All countries must submit progressively ambitious NDCs
Sources: Down to Earth, Copernicus ACP, Space.com