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Photo illustration: Shoshana Gordon/Axios. Photo: Ashley Cooper/Construction Photography/Avalon/Getty Images

On Tuesday, leaders of more than 90 countries will sign the U.S. and E.U.-sponsored Global Methane Pledge, which is designed to cut emissions of the powerful but short-lived planet-warming gas.

Why it matters: The significance of this pledge at the COP26 summit shouldn't be overlooked. Though it's less abundant than longer-lived carbon dioxide, methane is dozens of times more powerful at trapping heat in the atmosphere.

How it works: While efforts to cut carbon dioxide emissions require systemic change, such as retooling the way society generates and uses energy, methane is easier to target.

  • It only requires actions like plugging leaks in oil and gas infrastructure and other human-caused sources such as agriculture and waste.
  • The voluntary pledge commits countries to reducing methane emissions by 30% by 2030.
  • Pledge signatories include 15 of the world’s top 30 methane emitters: the United States, European Union, Indonesia, Pakistan, Argentina, Mexico, Nigeria, Iraq, Vietnam and Canada, the White House announced in a fact sheet.

Details: Recent U.N. reports found that tackling methane emissions in addition to carbon dioxide would pay dividends in the near term.

  • One report published in May by the U.N. Environment Program found that if global emissions of methane were slashed nearly in half by midcentury, it could prevent about 0.3°C (0.54°F) of warming.

The intrigue: President Biden's rollout of the methane pledge will be reinforced by action at home — unlike Biden's climate speech Monday at the summit, which was buffeted by Sen. Joe Manchin's (D-W.Va.) brushback against key pieces of his climate agenda in Congress.

Between the lines: On Tuesday, the EPA will propose new regulations targeting methane emissions from the oil and gas sector, including both existing and new sources of emissions.

  • The EPA regulations will also require states to develop plans to cut emissions from existing sources, including about 300,000 oil and gas well sites.
  • The methane rules would cut 41 million tons of methane emissions from 2023 to 2035, the EPA said in a statement. According to the agency, that’s more than the amount of carbon dioxide emitted from all U.S. passenger cars and commercial aircraft in 2019. 

Context: In recent years, methane concentrations in the atmosphere have increased at a faster rate, making some scientists suspicious of possible links to the boom in hydraulic fracturing, or fracking, for natural gas.

  • In addition, melting permafrost in the Far North can free up methane and other greenhouse gases that had been frozen for centuries in organic matter.
  • Countries are targeting methane to slow the rate of climate change in the next one to two decades, which could avert crossing climate change "tipping points" such as the collapse of the West Antarctic Ice Sheet.

Yes, but: Cuts in carbon emissions will be necessary to stem warming in the long term, and those pledges have been far harder to elicit from world leaders so far.

What's next: Methane emissions will soon be tracked down to individual sources via satellites, aircraft and ground-based instruments, making it possible for observations to transform a voluntary initiative like the Global Methane Pledge into an eventual regulatory regime.

Go deeper

CPS expands composting program — but slowly

Students at CPS schools that compost separate liquid from recyclables and compostables after their meals. Photo courtesy of Seven Generations Ahead

Chicago Public Schools could nearly double the number of schools that compost their food waste this school year.

2 hours ago - Health

Meta removes over 600 accounts linked to COVID disinformation effort by China

Facebook's corporate headquarters campus in Menlo Park, California. Photo: Josh Edelson/AFP via Getty Images

Meta announced Wednesday it has removed over 600 Facebook and Instagram accounts linked to a Chinese influence operation that claimed the U.S. was pressuring the World Health Organization (WHO) to blame COVID on China.

Why it matters: Though Meta said the network was unsuccessful, it marks yet another COVID disinformation campaign instigated by China in an effort to discredit the U.S.

Stacey Abrams launches second campaign for Georgia governor

Photo: Eze Amos/Getty Images

Stacey Abrams, voting rights activist and former 2018 candidate for Georgia governor, is running for the position again in 2022. Abrams would be the first Black female governor in the country.

Why it matters: Abrams caught national attention in 2018 by narrowly losing an election to Republican Gov. Brian Kemp in a state held firmly by the GOP for nearly two decades.