Colorado Faces Tougher Limit Under New Smog RulesThe Environmental Protection Agency has listed metro Denver and 10 other cities as failing to meet federal smog standards after seven years.
Colorado Seeks US Approval Of Sage Grouse Protection MeasureColorado is asking the federal government to approve a key part of the state's effort to protect the greater sage grouse.
Hickenlooper Not Sold On Proposed Ozone Rules, Says Denver At A DisadvantageThe U.S. secretary of energy made a visit to Colorado on Monday as the U.S. Environmental Protection Agency proposes another set of rules meant to improve Colorado's air quality, but Gov. John Hickenlooper isn't sold.
Colorado Already Has Methane Curbs Tougher Than ProposalStrict limits on methane emissions passed a year ago in Colorado mean the state's energy producers will not be affected by the federal government's new plan to crack down on the powerful greenhouse gas.
Colorado River Reaches GulfShe wasn't necessarily popping champagne Thursday, but conservationist Jennifer Pitt was certainly celebrating the arrival of water from the Colorado River into the Sea of Cortez.
Colorado Governor Touts Air Pollution RulesColorado Gov. John Hickenlooper is touting the state's new air pollution curbs on the oil and gas industry - but he insists that local efforts to curb drilling run afoul of constitutional property rights.
Colorado Oil, Gas Panel OKs Groundwater Sampling Rule Colorado oil and natural gas regulators on Monday approved rules making the state the first to require energy companies to do groundwater sampling both before and after they drill.
Obama Promotes Energy In Colorado, A State Divided By ItPresident Barack Obama had good reason to choose Colorado for a backdrop Thursday talking about energy policies.
Halliburton Exec Takes A Swig Of Fracking Fluid In DenverAn energy company executive's deed at an industry conference this month is bringing attention to new recipes for hydraulic fracturing fluids.
Groups File Separate Lawsuits Over Colorado EmissionsEnvironmental groups have filed two lawsuits in federal court over power-plant emissions in Colorado.