That's on top of other methane efforts. The Energy and State departments are creating guidelines to distinguish relatively climate-friendly fuel producers and exporters from their more high-emitting competitors. And the Securities and Exchange Commission and federal procurement agencies are readying rules that would require publicly traded companies and government contractors to report on direct and indirect greenhouse gas emissions, including methane, from their supply chains.
The White House did not respond to a request for comment. Methane traps more than 80 times as much heat as carbon dioxide on a 20-year time scale. But it exits the atmosphere and stops contributing to warming after about 12 years, compared with centuries for CO2. And it comes from much fewer sources than CO2.
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