Grist: Colorado health officials announced new rules on Monday that would work to cut the air pollution produced by oil and gas operations in the state. The rules would force companies to capture 95 percent of all toxic pollutants and volatile organic compounds they emit. In addition, the rules include a requirement that companies control emissions of the potent greenhouse gas methane, marking the first time a state has drafted rules to directly address the methane emitted by oil and gas operations, according...