Index
Simple Molecule; Complex Challenge
17 February 2026
Peter Coffee
For anyone who’s ever crossed paths with Star Trek, the phrase “a five-year mission” triggers the rest of the opening words: “to explore strange new worlds; to seek out new life and new civilizations…” (Fun fact, if you search Google with “five-year mission” in quotation marks, at least the first three pages of hits are all about that thirty-second fragment of sixty-year-old TV.) Star Trek, though, had three seasons of original-series opportunity to explore – unlike a real-life five-year mission, meant to explore our own still-strange world, that ended unexpectedly last June after only fifteen months. Even so, despite a premature loss of contact, the “MethaneSAT” spacecraft showed us things about our planet that could not be seen before.
If we don’t want future explorers from elsewhere to come upon our planet, and wonder how a world in the “Goldilocks zone” wound up becoming uninhabitable, we’d better look at what MethaneSAT has found.
It’s carbon dioxide that mostly hogs the spotlight on “greenhouse gases,” especially since a bold decision in 2009 to regulate that gas as a “pollutant”– despite the fact that animals exhale it, and trees inhale it. Nonetheless, the U.S. Environmental Protection Agency formally stated [PDF] that the “well-mixed greenhouse gases” sextet of “carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6)…may reasonably be anticipated both to endanger public health and to endanger public welfare.”
That 2009 EPA action is back in the news this week, since its core “endangerment finding” has now been formally rescinded by the present administration. CO2 is getting most of the attention, since conspicuous smokestack and tailpipe emissions from CO2-producing combustion reactions are the obvious bad actors in greenhouse warming, but let’s talk for a moment about too-often-ignored methane – sometimes derisively dismissed as “cow farts,” although 80% of the methane that comes from cattle is from burps.
Methane is a molecule so simple that any schoolchild could model it: a central carbon atom, with a surrounding flock of four hydrogens. Methane is the main ingredient in natural gas, with large reservoirs occurring naturally underground (including under the sea floor). Methane in the earth’s atmosphere, though, is not a natural resource; it’s an unnatural disaster.
Unnatural? In 2022, a United Nations “Global Methane Assessment” [PDF] estimated that
Current atmospheric methane concentrations are now 260 per cent of pre-industrial levels
These increases are overwhelmingly caused by human activity – as opposed to natural emissions from (primarily) wetlands
Disaster?
According to NASA calculations, “Methane is a powerful greenhouse gas that traps heat 28 times more effectively than carbon dioxide over a 100-year timescale”
Human-activity methane emissions (mostly from agriculture, fossil fuel energy, and human waste) are responsible for nearly 45 per cent of current net planetary warming
Unlike smoke-belching emitters of CO2, methane leaks are often hidden from plain sight. “Fossil fuels represent 18 percent of the total [methane emissions] budget. Of this, about 63 percent is derived from oil and gas production and pipelines,” estimates a report on work being done by the MIT Methane Network. The natural gas distribution system is widely distributed, often neglected, implacably aging, and consequently riddled with large numbers of tiny leaks: it’s a difficult target for emission reduction. “Methane emissions from natural gas infrastructure largely erode the apparent post-2005 decline in United States emissions,” warned a paper published in November 2025.
Enter MethaneSAT, whose mission team members described its capabilities as a combination of “high precision and a wide view path…to track emission rates and locations and show how those emissions are changing over time.” Summarizing the year-plus of data that was obtained from the spacecraft, they assert that
Global data gathered by MethaneSAT during its year in operation show that emissions from the global oil and gas industry consistently exceed the figures reported in commonly cited inventories by significant margins… Overall oil and gas methane emissions as measured by MethaneSAT were 50 percent higher than reported in the widely cited Emissions Database for Global Atmospheric Research and U.S. EPA’s Greenhouse Gas Inventory.
Further, and especially worth noting,
Low-producing wells contribute an outsized share of emissions: Using MethaneSAT’s unique high precision, high resolution measurements, we calculate that 40 percent of methane emissions in production-only portions of eight top oil and gas basins in the U.S. came from areas responsible for less than seven percent of production.
The team’s accomplishments in only fifteen months on orbit should make us hungry for more: “MethaneSAT has released data showing more than 221 scenes in 45 different oil and gas-producing regions globally, together accounting for half of the world’s onshore oil and gas production.” Well done.
Note also, importantly, that “methane intensity of producers in the New Mexico side of the Delaware sub-basin of the Permian—which has strong oil and gas methane regulations—is less than half what it is next door in Texas, which lacks strong state regulations.” It’s therefore not just about what’s been seen. It’s about what it means. With the right levers, the world can be moved.