DENVER (AP) — The Colorado Supreme Court refused to reconsider its ruling that oil and gas regulators do not have to make health and environmental protection their top priority.

The court offered no explanation in its announcement, dated Monday and made public Tuesday.

Seven young plaintiffs who filed a lawsuit seeking stronger health and environmental rules had asked the court to revisit the Jan. 14 ruling. The plaintiffs include Hispanics and Native Americans, and they argued that a lower court judge who had a hand in the case may have been biased against them.

The judge, Laurie Booras of th...