California regulators voted on Thursday to update a 15-year-old rule controlling emissions of methane from municipal landfills, the second-largest source of the climate super pollutant in the state.

The effort by California’s greenhouse gas regulators to strengthen oversight and align methods to control and monitor methane emissions from landfills with the latest technological advances is long overdue, according to activists and residents living with the air pollution.

“Our overarching goal is to improve methane emissions control to help California achieve its climate targets,” said Quinn Langfitt, an air pollution specialist with California’s Air Resources Board (CARB), during a public hearing on the amended rule in Sacramento.

The landfill methane rule amendments leverage more than a

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