On June 28, the Supreme Court denied a request by Montana and Wyoming to sue Washington over state authority to block a coal export terminal.
The House of Representatives has passed a resolution overriding a Trump-era effort to eliminate rules limiting methane discharges.
Colorado lawmakers acted Tuesday evening to establish enforceable greenhouse gas emission limits in a new bill sent to Gov. Polis.
The Biden administration sent a mixed signal in late May about its commitment to reversing course on oil exploration and extraction in Alaska.