US oil and gas producers have begun to follow their European rivals in setting ambitious targets on cutting their emissions amid mounting investor pressure over climate change.
Pioneer Natural Resources, the biggest independent oil and gas producer in the Permian Basin, last week vowed to cut the intensity of its greenhouse gas emissions by a quarter by the end of the decade.
That followed recent announcements by rivals ConocoPhillips and Occidental Petroleum that they would reduce emissions from their operations to net-zero by mid-century, marking the first such pledges by big American oil companies.
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