Environmental groups in Minnesota are considering their next steps on the heels of a regulatory decision they said weakens the state's landmark carbon-free electricity law.

Late last week, the Public Utilities Commission clarified which technologies should be in the mix, as energy providers try to meet the requirement of 100% carbon-free electricity by 2040. The commission opened the door to allowing biomass -- namely the burning of wood -- and trash incineration to count as clean sources.

Barbara Freese climate program attorney at the Minnesota Center for Environmental Advocacy, said it is troubling the commission did not rule biomass options out.

"The law clearly said that to be carbon free, a generating source has to generate without emitting carbon dioxide," Freese pointed out. "These two sources of electricity, solid waste and biomass, emit tremendous amounts of carbon dioxide."

But utilities like Minnesota Power prioritize biomass as a form of renewable energy, with supporters arguing it is better to burn wood scraps from the logging industry than let it decompose. They argued it creates other carbon dioxide issues, and a carbon-neutral approach helps carry out the mission of the law. The commission decided more analysis is needed to get a clearer picture of the eligibility of these sources.

Despite the outcome, Minnesota's carbon-free requirement is not going away as the state added renewables like wind and solar. Freese expressed concern about what lies ahead.

"We can't be confident that the wording of the law will be accurately enforced," Freese contended. "And that is very troubling because there's going to be a lot of pressure to try to weaken this law."

She suggested pressure will not end with last week's decision. The law provides "offramps" for utilities struggling to meet the standard if clean-energy technologies are too costly or hinder grid reliability. And there is a push in the Midwest region to approve carbon-capture projects, with skeptics arguing some proposals are too large-scale and have yet to prove their effectiveness.


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New York State authorized utilities to develop thermal energy network pilot programs to further its decarbonization goals. Thermal energy networks use non-emitting energy sources like geothermal boreholes or waste-heat, to heat and cool buildings. Eleven pilot projects stem from commitments made in the 2022 Utility Thermal Energy Network and Jobs Act.

Allison Considine, senior campaigns and communications manager for New York, Building Decarbonization Coalition, said college campuses with these systems are seeing a striking number of benefits.

"Using a thermal energy network, especially with geothermal is about six times more efficient than using a traditional gas furnace or oil furnace," she explained.

She added that buildings must go electric if New York will reach its decarbonization goals. Though the state's Building Code Council included the All-Electric Buildings Act in its 2025 draft code update, neighborhoods still face challenges in implementing thermal energy networks. Considine said barriers in state law prevent utilities from connecting multiple independently owned buildings to a thermal energy network.

The pilot programs could reach active construction by 2026 or 2027. They'll be online for five years so the respective utility agencies can gather data about their efficacy. But, to ensure the transition to cleaner fuels, Considine said certain laws have to be changed to move New York away from fossil fuel energy systems.

"And there's a provision on the books, we kind of call it New York's pro-gas mandate, which requires utilities to continue delivering gas service if a customer demands it, even if there is a less polluting, more affordable alternative for that customer," she added.

The New York HEAT Act would end this rule and allow the state to move toward a more energy-efficient future. The bill gives the state's Public Service Commission authority to align utility companies with the state's climate laws. It also phases out gas line extension allowances, which reduced the use of gas in the state.

As parts of the country brace for and continue to recover from hurricanes, flooding and a new normal, research shows wind and solar resources tend to be available during extreme weather events. Energy experts in Kentucky say the data highlight how installing solar and batteries can help support the state's shared electric grid.

Josh Bills, a senior energy analyst with the Mountain Association, explained that solar has the advantage of requiring no moving parts, and relies on electrons generated from the sun that rises and sets in a predictable fashion.

"It's not a centrally located energy resource, a large generator that has to be distributed hundreds of miles through infrastructure, whereas a lot of the wind and solar is much closer to the points of use," he said.

The analysis shows that certain types of extreme weather are a good fit for renewable sources. For example, a heat wave that triggers a higher grid load from the use of fans and air conditioning also often coincides with bright, sunny days that trigger high levels of solar power. Similarly, a strong wintertime cold front that increases the need for heating also brings strong wind gusts that can power wind generation to meet those needs.

Bills added those who've made the shift to solar in the Commonwealth are seeing increased resiliency.

"Here in Kentucky, with the people and businesses and nonprofits that we work with, we see firsthand enterprises benefiting from adding solar to facilities, " he continued.

The study also found long periods of low wind and sun could in the future be the new "extreme" weather when it comes to the impact on the local renewable power supply.


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By Dan Gearino for Inside Climate News.
Broadcast version by Joe Ulery for Indiana News Service reporting for the Solutions Journalism Network-Public News Service Collaboration

Duke Energy is proposing a three-year extension for the Gibson power plant in southwest Indiana, the second-largest coal-fired power plant in the country.

Gibson, originally scheduled to close in 2035, would remain open until 2038 and would get a retrofit to be able to run on natural gas or coal, according to a plan the utility released this week.

Duke said the proposal, if adopted by state regulators, will give it the resources and flexibility needed to handle a projected increase in electricity demand. At the same time, environmental advocates said the plan reflects an overreliance on fossil fuels and is a retreat from what they already saw as a weak approach to reducing emissions.

The dynamics in Indiana are similar to other states as the growth of data centers and regulatory backlogs in building renewable energy are making utilities more cautious about closing fossil fuel power plants.

But Indiana is a special case for a few reasons, including its history of coal mining and its heavy use of coal for producing electricity. The state ranks fourth in the country in electricity generation from coal, behind Texas, West Virginia and Kentucky, according to the Energy Information Administration.

Just a few years ago, Indiana was notable for taking steps away from coal. One of its utilities, NIPSCO, got national attention for its plan to close all its coal plants by 2028. Three years ago, the utility AEP said it would close the Rockport coal plant, the second-largest in Indiana and among the 10 largest in the country, by 2028.

The new Duke plan, which covers its Indiana power plants through 2044, is likely to add to concerns that Indiana utilities are backsliding on the progress they seemed to be making.

“These utility commitments are not really commitments,” said Ben Inskeep, program director for Citizens Action Coalition, a consumer and environmental advocacy group based in Indianapolis. “When the utility says they’re doing X by Y year, you know, if there’s no law forcing them to do so, they can change those plans on a dime.”

Indiana law requires electricity utilities to issue long-term plans for power plants every three years. Regulators will review the filing, take testimony from interested parties and then issue comments.

Nathan Gagnon, Duke’s managing director for Midwest resource planning, explained the proposal during an hours-long video meeting with interested parties. He spoke about a summary of the plan, with a more detailed filing to come in November.

“Coal drops off pretty steeply,” he said about the later years under the proposal. “There’s not much coal in the mix after ‘31 when you get down to it.”

He fielded questions from viewers, including members of the public, who had concerns about climate change and also wanted the company to explore developing new nuclear plants.

His answers highlighted that it takes years to implement big changes to electricity resources and that the company is looking for scenarios that have low costs while still meeting customers’ needs and following federal emissions rules.

Duke, based in North Carolina, is one of the country’s largest utilities, with customers in the Carolinas, Florida, Indiana, Kentucky and Ohio.

It is proposing various changes to the five generating units at Gibson, which together have a summer generating capacity of 3,132 megawatts. Southern Co.’s Plant Bowen in Georgia, with capacity of 3,200 megawatts, is the only coal-fired plant that’s larger.

Under Duke’s preferred planning scenario, Gibson units 1 and 2 would be retrofitted by 2030 to be able to burn both coal and natural gas. Units 3 and 4 would be replaced by natural gas generating units by that same year and have no timetable for closing. Unit 5 would close by 2030.

Duke also is proposing to convert the Cayuga and Edwardsport coal plants to run on natural gas. (Edwardsport is unlike the other coal plants in that it uses a “coal gasification” technology that Duke once promoted as highly efficient, and now would be replaced by a less expensive process.)

Duke’s plan includes several gigawatts of new wind and solar, but most of this is in the last few years of the timeline.

The slow rollout of renewables is a detail that jumped out to Brendan Pierpont, director of electricity modeling for the think tank Energy Innovation. He said Duke’s modeling of future costs of renewables look high to him, and creates a distorted picture.

“That’s a clear place where they have put their thumb on the scales,” he said.

He said Duke’s lack of near-term progress on renewables detracts from the company’s credibility when it talks about reducing emissions.

Duke issued this statement along with the plan:

“Duke Energy’s carbon emissions reduction goals remain unchanged, but our progress will not be linear as we retire coal and bring new generation resources online. Over time our diverse energy mix will enable us to reach our 2050 net-zero carbon emission ambitions.”


Dan Gearino wrote this article for Inside Climate News.


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