An environmental group claims 70% of Colorado’s greenhouse gas emissions come from oil and gas. But that’s in dispute.
350 Colorado’s worst-case scenario modeling suggests oil and gas should be gone from the state by 2030 to slow climate change.
Wildfire smoke accounted for up to half of air pollution in the West in recent years
Gains made from cleaner power plants and vehicles were lost to massive wildfires that charred landscapes, including massive burns in Colorado
Squeezed by two megafires: Northern Water’s race to save Grand Lake
Colorado's largest exporter of water from the Western Slope had to use an untested backup system to make sure water kept flowing from taps on the Front Range.
The 25 most-read Colorado Sun guest opinion pieces of 2020
Our contributors weigh in on issues facing Colorado; here are the essays that drew the most readers
Connecting to nature is good for kids – but they may need help coping with a planet in peril
Families kept home by pandemic restrictions report mounting stress and deteriorating behavior in their children
Despite recent snowstorms, Colorado’s drought conditions continue in “anomalous” direction
There were only seven other weeks in the past 20 years that have been as intensely dry as the state’s current status
Tri-State increases the amount of greenhouse gases it will cut in Colorado by adding wind and solar generation
Colorado's second largest electricity provider is now on par with other utilities for carbon dioxide reduction, but it will need to stop buying coal-fired power from elsewhere to do it
The high cost of climate change is already straining the budgets of Colorado towns
As wildfires, avalanches and drought increase in intensity, worried city managers are planning and budgeting for better water systems and backup sources.
“Flaring” at oil and gas wells to be curtailed as Colorado regulators adopt some of nation’s strictest rules
The practice of burning off natural gas is relatively rare in Colorado, but tough rules on flaring and venting may help the state meet greenhouse gas reduction goals.
“Worse than anything you could have imagined”: How the East Troublesome fire became so destructive
The Colorado Sun interviewed about a dozen firefighters, first responders and evacuees to piece together a timeline of the East Troublesome fire’s terrifying 100,000-acre run on Oct. 21
Colorado regulators probe why the coal-fired Comanche 3 power plant has been out of service for months
Xcel Energy customers have been paying for the $1.3 billion plant since it opened in Pueblo 10 years ago and now are picking up the tab for costly repairs and electricity purchased to meet summer demand
Opinion: Let’s end the wasteful practice of routine venting and flaring from oil and gas sites
Wildfires make work to reduce Colorado’s greenhouse gas emissions even more crucial, Gov. Polis says
In an address to state air-quality regulators, Polis reaffirmed ambitious climate-related goals. But some say the roadmap to reach them lacks urgency.
“Lots of structure loss” after East Troublesome fire’s explosion into Grand Lake, but changing weather slows march toward Estes Park
Massive Grand County fire charred another 50,000 acres Thursday, topping 170,000 acres to become the second largest fire in Colorado's history