The Colorado Air Quality Control Commission has approved a compromise proposal, negotiated by environmental groups, local governments, and industry groups, for a first-in-the-nation rule to require some pneumatic control devices at oil-and-gas facilities to be retrofit to lower methane emissions. A coalition of conservation groups — Sierra Club, Earthworks, and Center for Biological Diversity, represented by Earthjustice — partnered with other environmental groups, local governments, and industry to tackle the problem of emissions from pneumatic controllers.