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Mark Jaffe

Special to The Colorado Sun

Colorado regulators target tiny oil field device that’s a big contributor to greenhouse gas, ozone pollution

Even major oil companies admit that tens of thousands of pneumatic controllers should be upgraded to prevent natural gas from seeping out

Colorado governor releases final plan to reduce emissions by 90%. It’s still too vague, environmentalists say.

The Air Quality Control Commission is responsible for reducing carbon dioxide emissions from millions of vehicles and industrial and office buildings

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.

Colorado is behind on targets to cut greenhouse gas emissions. How far should the state push industry to get there?

Critics say the governor's roadmap is guided by "wishful thinking" rather than binding mandates to cut emissions blamed for climate change.

Xcel Energy moves up closure dates for coal-fired power plant near Steamboat Springs

Hayden Generating Station units 1 and 2 will be closed without layoffs of 75 people who work there, utility giant says as it moves toward 100% carbon-free electricity by 2050.

Colorado regulators hit brakes on Xcel Energy’s plan for a $30 million electric vehicle rebate program

The Public Utilities Commission pared back the plan to $5 million and limited it to income-qualified buyers. But one commissioner would prefer the money be spent on “societal programs, like school bus electrification.”

Order to close three Colorado coal-fired power plants early reversed, regulators cite “incomplete” information

Colorado’s Air Quality Control Commission said issues around closing plants a year early were too complex

It will take $130M to get more EVs on Colorado roads. Xcel wants its customers to cover the cost.

Consumer advocates and the PUC staff are troubled by how much influence Xcel Energy had in developing a $30 million rebate program funded by electric customers

Ambitious plan to reduce CO2 emissions still leaves Tri-State getting 23% of electricity from coal plants

The state’s second largest electric provider plans to spend $21 billion to add renewable sources and battery storage. Natural gas is in the mix.

Three coal-burning power plants in Colorado face orders to close early. Their owners aren’t happy about it.

Tri-State, Xcel and Platte River Power had the closures slated for 2030. But Colorado air quality regulators say it must be done earlier to meet greenhouse gas targets.

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.

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

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.

Colorado releases its plan to slash greenhouse gases, leaving some environmental groups wanting more

The Colorado Greenhouse Pollution Reduction Roadmap, nine months in the making, quickly drew flak when it was released on Wednesday

Colorado draws 2,000-foot statewide oil and gas drilling setback. But it comes with a big “however.”

Regulators on Thursday set the new setback rule with “offramps” oil and gas companies can use to get as close as 500 feet to houses. A formal vote will come Nov. 6.

Oil and gas companies must monitor fracking emissions as Colorado adopts first-in-the-nation rules to reduce air pollution

Some environmental groups say the new regulations, which also give local governments access to collected data, aren’t fully baked even after long negotiations

Is Colorado leading or lagging on climate policy? It depends on which states you’re comparing us to.

On the one hand, the state has adopted some of the most ambitious climate laws in the county; on the other, critics say Gov. Jared Polis’ administration has failed to use the laws to their fullest.

A guide to how Colorado’s climate-change response compares to California’s and other states

While there are some similarities between states in working to combat a warming planet, the U.S. is really a mosaic of approaches

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