The EPA slashed by 90 percent its estimate of the costs methane emissions impose on society and the climate as part of its bid to justify delaying Obama-era pollution standards for oil and gas drilling operations.

Tucked in an updated cost-benefit analysis on its plans to pause the methane regulation, the Environmental Protection Agency includes a recalculated value for the social cost of methane, which estimates the cost to society per ton of methane emissions in a given year....