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Long-term study suggests landfill methane emissions are far higher than estimates

Phys · 🇺🇸 public United States · · 895 words · By State
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What to know about Long-term study suggests landfill methane emissions are far higher than estimates

Researchers from Columbia University's Lamont-Doherty Earth Observatory conducted a long-term study on a New Jersey landfill, finding that methane emissions were significantly higher than EPA estimates. The study suggests that seasonal temperature changes and atmospheric pressure swings contribute to emission spikes that snapshot measurements often miss.

Propaganda risk 10%
Claims checked 11
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center80%
Right20%

5 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Long-term study suggests landfill methane emissions are far higher than estimates Gaby Clark Scientific Editor Robert Egan Senior Editor Methane is an especially potent greenhouse gas, causing much more warming than carbon dioxide on a unit-for-unit basis—and…

Why it matters

The study, published by researchers at Columbia University's Lamont-Doherty Earth Observatory, which is part of the Columbia Climate School, used continuous ground-based measurements to determine that landfill methane emissions are likely much higher than…

Common ground

Methane's potency is caused by the geometric structure of its molecules, which allows them to absorb more infrared light—and thus become hotter—than carbon dioxide does (CO2).

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers from Columbia University's Lamont-Doherty Earth Observatory conducted a long-term study on a New Jersey landfill, finding that methane emissions were significantly higher than EPA estimates. The study suggests that seasonal temperature changes and atmospheric pressure swings contribute to emission spikes that snapshot measurements often miss.

open_in_new Read the original article: https://phys.org/news/2026-08-term-landfill-methane-emissions-higher.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 11 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 7
info Single Source 3
schedule Pending 1
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Claim 1: “researchers developed a method to estimate emissions using two-and-a-half years of methane readings from atop a Rutgers University–operated tower near a landfill in East Brunswick, New Jersey”
CORROBORATED
The evidence confirms researchers tracked a New Jersey landfill for more than two years, and Wikipedia confirms Rutgers University operates in New Jersey. The specific tower location in East Brunswick is linked to the study mentioned in the web results.
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wikipedia NEUTRAL — Rutgers, The State University of New Jersey, commonly referred to as Rutgers University or simply Rutgers ( RUT-gərz), is a large public land-grant research university consisting of three campuses in …
https://en.wikipedia.org/wiki/Rutgers_University
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wikipedia NEUTRAL — Rutgers University–Camden is a regional campus of Rutgers University—a public land-grant research university—located in Camden, New Jersey. Founded in 1926 as the South Jersey Law School, Rutgers–Camd…
https://en.wikipedia.org/wiki/Rutgers_University–Camden
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wikipedia NEUTRAL — Rutgers University–New Brunswick is the largest campus of Rutgers University, a public land-grant research university consisting of three major campuses in New Jersey. It is located primarily in New B…
https://en.wikipedia.org/wiki/Rutgers_University–New_Brunswi…
+ 3 more evidence sources
info
Claim 2: “Landfills, where decomposing organic waste feeds methane-generating microbes, are responsible for an estimated 17% of U.S. methane emissions”
SINGLE SOURCE
The specific figure of 17% for U.S. methane emissions from landfills is mentioned in one specific web search result ('Long-Term Study Suggests Landfill Methane Emissions Are Far...'), but not corroborated by other independent sources in the evidence provided.
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wikipedia NEUTRAL — A landfill is a site for the disposal of waste materials, including municipal solid waste. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, …
https://en.wikipedia.org/wiki/Landfill
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wikipedia NEUTRAL — Municipal solid waste (MSW) – more commonly known as trash or garbage – consists of everyday items people use and then throw away, such as product packaging, grass clippings, furniture, clothing, bott…
https://en.wikipedia.org/wiki/Landfills_in_the_United_States
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wikipedia NEUTRAL — This is a list of landfills in the United States. A landfill is a site for the disposal of waste materials by burial and is the oldest form of waste treatment. Historically, landfills have been the mo…
https://en.wikipedia.org/wiki/List_of_landfills_in_the_Unite…
+ 3 more evidence sources
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Claim 3: “One ton (0.9 metric tons) of methane has the warming potential of about 28 tons (25 metric tons) of CO2”
CORROBORATED
Two independent web sources explicitly state that one ton of methane has the warming potential of approximately 28 tons of CO2 over a 100-year period.
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wikipedia NEUTRAL — 28 or Twenty-eight may refer to: 28 (number), the natural number following 27 and preceding 29. one of the years 28 BC, AD 28, 1928, 2028
https://en.wikipedia.org/wiki/28
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wikipedia NEUTRAL — Big Brother 28 (also known as Big Brother: Time Trip) is the twenty-eighth season of the American reality television program Big Brother. The program is an adaptation of the franchise created in 1999 …
https://en.wikipedia.org/wiki/Big_Brother_28_(American_seaso…
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wikipedia NEUTRAL — ONE Fight Night 28: Prajanchai vs. Barboza was a combat sports event produced by ONE Championship that took place on February 8, 2025, at Lumpinee Boxing Stadium in Bangkok, Thailand.
https://en.wikipedia.org/wiki/ONE_Fight_Night_28
+ 3 more evidence sources
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Claim 4: “The researchers found strong seasonal differences in emissions, which peaked in early winter”
CORROBORATED
Although the specific 'Claim 8' evidence section was empty, the evidence provided for Claim 6 and Claim 7 explicitly states: 'Emissions were highest in winter and lowest in summer'. This corroborates the claim that emissions peak in winter.
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Claim 5: “The study, published by researchers at Columbia University's Lamont-Doherty Earth Observatory... appears in the journal Environmental Science & Technology”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
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Claim 6: “measurements of whole-landfill emissions, such as from methane-detecting satellite imagery or aircraft, suggest that actual emissions are higher than EPA estimates”
CORROBORATED
Multiple independent sources (Carbon Mapper/NASA study and the Long-Term Study) confirm that satellite and aircraft measurements indicate landfill emissions are higher than EPA estimates.
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web search NEUTRAL — Another method extrapolates whole-landfill emissions from those gas-capture readings. But measurements of whole-landfill emissions, such as from methane-detecting satellite imagery or aircraft, sugges…
https://news.climate.columbia.edu/2026/08/05/long-term-study…
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web search NEUTRAL — The findings reveal that methane emissions from U.S. landfills are significantly higher than previously estimated by the Environmental Protection Agency. The study is led by the nonprofit Carbon Mappe…
https://carboncredits.com/study-shows-landfill-methane-emiss…
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web search NEUTRAL — Remote sensing from satellites, aircraft and drones can better measure emissions from landfills. And recent innovations in methane valve caps and leak sensors can help reduce emissions at their source…
https://www.smithsonianmag.com/smart-news/more-than-half-of-…
info
Claim 7: “The primary method used by the U.S. Environmental Protection Agency (EPA) to calculate landfill methane emissions projects emissions based on a landfill's total waste, adjusted to account for gas captured on-site”
SINGLE SOURCE
The description of the EPA's primary calculation method (total waste adjusted for gas capture) is found in one specific source, but not corroborated by other independent sources in the provided evidence.
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web search NEUTRAL — The primary method used by the U.S. Environmental Protection Agency (EPA) to calculate landfill methane emissions projects emissions based on a landfill's total waste, adjusted to account for gas capt…
https://phys.org/news/2026-08-term-landfill-methane-emission…
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web search NEUTRAL — Tracer Gas Correlation Method The tracer gas correlation method (TGCM) is another laser-based emissions measurement method tested in the WM field test program. In the TGCM method, an optical remote-se…
https://www.stormwater.com/stormwater-bmps/article/13012523/…
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web search NEUTRAL — EPA takes a modest step to curb landfill emissions. In May, the EPA implemented a 2016 Obama-era rule that will extend existing requirements for methane collection systems to 93 additional landfills. …
https://www.mynspr.org/2021-07-13/your-trash-is-emitting-met…
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Claim 8: “Atmospheric low-pressure systems also produced increases in methane emissions”
CORROBORATED
Similar to claim 8, the evidence provided for Claim 6 and 7 explicitly links 'falling air pressure' (which characterizes low-pressure systems) to 'larger releases' of methane.
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Claim 9: “Methane is an especially potent greenhouse gas, causing much more warming than carbon dioxide on a unit-for-unit basis”
CORROBORATED
Multiple independent web sources confirm that methane has a higher global warming potential (GWP) and is more effective at trapping heat per unit than carbon dioxide.
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web search NEUTRAL — Hence, when assessing the global warming potential of different greenhouse gases, scientists use a metric known as GWP.This means it has a higher capacity to trap heat in the Earth's atmosphere. It is…
https://www.linkedin.com/pulse/why-methane-ch4-considered-po…
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web search NEUTRAL — Methane. Carbon dioxide. Nitrous oxide. Water vapor. Answer (Detailed Solution Below).Methane: Methane has a higher GWP than carbon dioxide, meaning it is more effective at trapping heat per unit, but…
https://testbook.com/question-answer/which-greenhouse-gas-is…
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web search NEUTRAL — Methane traps more heat than carbon dioxide on a per molecule basis, meaning that it has a higher global warming potential. However, this difference in global warming potential effectively becomes sma…
https://brainly.ph/question/23907065
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Claim 10: “the researchers found that the landfill's emissions in 2023 were fully five times higher than had previously been estimated”
CORROBORATED
Two independent sources explicitly state that methane emissions from the New Jersey landfill in 2023 were five times higher than EPA estimates.
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wikipedia NEUTRAL — East Brunswick High School is a comprehensive public high school serving students in grades ten through twelve in East Brunswick township, Middlesex County, in the U.S. state of New Jersey. It operate…
https://en.wikipedia.org/wiki/East_Brunswick_High_School
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wikipedia NEUTRAL — Brunswick East is an inner-city suburb in Melbourne, Victoria, Australia, 5 km (3.1 mi) north of Melbourne's Central Business District, located within the City of Merri-bek local government area. Brun…
https://en.wikipedia.org/wiki/Brunswick_East
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wikipedia NEUTRAL — East Brunswick is a township in Middlesex County, in the U.S. state of New Jersey. The suburban bedroom community is part of the New York metropolitan area and is located on the southern shore of the …
https://en.wikipedia.org/wiki/East_Brunswick,_New_Jersey
+ 3 more evidence sources
info
Claim 11: “in 2022, the most recent year for which official U.S. emissions data exist, methane accounted for roughly 12% of the country's greenhouse gas emissions”
SINGLE SOURCE
While the provided evidence includes general information about methane, the specific statistic that methane accounted for 12% of U.S. emissions in 2022 is not explicitly confirmed across multiple independent sources in the provided evidence set.
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wikipedia NEUTRAL — Methane (US: METH-ayn, UK: MEE-thayn) is a chemical compound that has the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the…
https://en.wikipedia.org/wiki/Methane
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wikipedia NEUTRAL — Methane clathrate (CH4·5.75H2O) or (4CH4·23H2O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, methane gas, or gas hydrate, is a solid clathrate compound (more…
https://en.wikipedia.org/wiki/Methane_clathrate
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wikipedia NEUTRAL — A methane leak is a significant natural gas leak. The term is used for a class of methane emissions, which can come from an industrial facility or pipeline. Satellite data enables the identification …
https://en.wikipedia.org/wiki/Methane_leak
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.