Oil producers in the Permian Basin must do more to disclose and stop the leak of methane, a powerful greenhouse gas, a House committee wrote in a letter to 10 major oil companies.The letter from the House Science Committee was sent to some of the largest fossil fuel producers in the Permian Basin, a major source of oil and natural gas that includes vast portionsof Texas and New Mexico. Among them were Exxon Mobil Corp., Occidental Petroleum Corp., ConocoPhillips, Chevron Corp., and Pioneer Natural Resources Co.
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