Colorado Sierra Club
Sierra Club threatens to suspend 20,000-member Colorado chapter
National leadership cites ongoing conflicts between local management and volunteers, and says it may appoint other Colorado members to take over.
Colorado allows an Eastern Plains power plant to emit toxic sulfur dioxide emissions far above safe levels, groups claim
A broad coalition of activists says it has done its own pollution modelling and analyzed EPA data, finding the Brush coal-fired station violated standards for hundreds of hours in the past two years.