The effort comes as the United States seeks to sustain its liquefied natural gas, or LNG, exports to Europe to displace Russian fuel, while also promoting efforts to fight global warming. A credible market for certified natural gas could help it tackle both goals at once. Crabtree said he hosted a workshop in October with gas industry representatives, including a new industry group called the Differentiated Gas Coordinating Council (DGCC), to discuss standards for certified gas. While gas burns cleaner than other fossil fuels, its main component is the powerful greenhouse gas methane, which can leak into the atmosphere from drilling, processing, shipping and distribution. Palti-Guzman said certified gas could also be key to securing a longterm role for U.S. LNG in Europe where carbon prices last month hit a record 100 euros per tonne.

---