Flames from a flaring pit near a well in the Bakken oil field in North Dakota. Satellites are gathering methane release data from the oil and gas industry. As satellites deliver more accurate data on methane emissions from oil and gas production, scientists are getting a clearer picture of how natural gas stacks up against .
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Carl Icahn on Thursday said he was trying to gain control of Southwest Gas Holdings' board and replace its chief executive, as the Nevada utility is moving forward with a planned acquisition that the billionaire activist investor says hurts shareholders.