Chapter 09 · Sustainability & AISustainability & AI

Methane emissions detection

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Definition

Identifying and quantifying methane releases from satellites, aircraft and ground sensors, with AI used to detect plumes and attribute them to sources.

References

UNEP IMEOMethane Alert and Response System (MARS)

This source provides part of the technical or institutional basis for the definition.

NASA Jet Propulsion LaboratoryNASA sensor identifies human-caused methane super-emitters (2022)

This source supports the explanation of how the term is applied, measured or governed in practice.

Overview

What it means

Methane is a potent short-lived greenhouse gas, and large point-source leaks are detectable from orbit. UNEP's International Methane Emissions Observatory runs the Methane Alert and Response System — launched at COP27 in 2022 — which combines more than 30 satellite instruments with AI analysis to notify governments and companies of major events.

How it is used

Operators and regulators use detection data to find and fix super-emitter events in oil and gas, waste and agriculture; MARS data is published on UNEP's Eye on Methane platform. IEA analysis notes response rates to notifications remain low — a governance gap, not a detection gap.

Why it matters

Cutting methane is among the fastest levers on near-term warming, and leaks are cheapest to fix when found. AI-driven detection has solved the finding; the binding constraint now is whether notified actors respond.