By Stephen Robert Miller for the Food and Environment Reporting Network.
Broadcast version by Eric Galatas for Colorado News Connection reporting for the Solutions Journalism Network-Public News Service Collaboration

If you’ve gone walking in the woods out West lately, you might have encountered a pile of sticks. Or perhaps hundreds of them, heaped as high as your head and strewn about the forest like Viking funeral pyres awaiting a flame.

These slash piles are an increasingly common sight in the American West, as land managers work to thin out unnaturally dense sections of forests — the result of a commitment to fire suppression that has inadvertently increased the risk of devastating megafires.

“We have an epidemic of trees in Colorado,” said Stefan Reinold, a forester with Boulder County’s Parks and Open Space department. In the Rocky Mountain forests that he manages, a century of stamping out wildfires as soon as they arose failed to account for the role fire plays in maintaining healthy forest ecosystems. Today, the resulting abundance of densely packed pines and firs fuels huge blazes.

In response, the federal government has committed nearly $5 billion in the Inflation Reduction Act and Bipartisan Infrastructure Law to thinning forests on about 50 million Western acres over the next 10 years. Although this can be accomplished with prescribed burns, the risk of controlled fires getting out of hand has foresters embracing another solution: selectively sawing trees, then stripping the limbs from their trunks and collecting the debris.

The challenge now is what to do with all those piles of sticks, which create fire hazards of their own. Some environmental scientists believe they have an answer: mushrooms. Fungus has an uncommon knack for transformation. Give it garbage, plastic, even corpses, and it will convert them all into something else — for instance, nutrient-rich soil.

Down where the Rocky Mountains meet the plains, in pockets of forest west of Denver, mycologists like Zach Hedstrom are harnessing this unique trait to transform fire fuel into a valuable asset for local agriculture.

For Hedstrom, the idea sprung from an experiment on a local organic vegetable farm. He and the farm owner had introduced a native oyster mushroom to wood chips from a tree that fell in a windstorm. “That experiment showed us that the native fungi were helping to accelerate the decomposition really substantially,” he said. Working with local governments, environmental coalitions, and farmers, he is now honing the method.

As part of its regional strategy, the U.S. Forest Service plans to thin more than 47 square miles — an area larger than Disney World — along Colorado’s Front Range. Hundreds of thousands of slash piles already lay in wait here until conditions are right for burning. Ideally, this means snow on the ground, moisture in the air, and little wind. It can be a hard recipe to come by.

When slash piles are set alight, they burn longer and hotter than most wildfires over a concentrated area. This leaves behind blistered soil where native vegetation struggles for decades to take root. As an alternative, foresters have tried chipping trees on-site and broadcasting the mulch across the forest floor, where it degrades at a snail’s pace in the arid climate. Boulder County also carts some of its slash to biomass heating systems at two public buildings. “We’re removing a ton of wood out of forests for fire mitigation,” Hedstrom said. “This is not a super sustainable way of managing it.”

He hopes to show that fungi can do it better.

Jeffrey Ravage is a forester with the Coalition for the Upper South Platte, which manages protection and restoration of a more-than-million-acre watershed in the mountains southwest of Denver. He describes the action of saprophytes, a type of fungi that feeds off dead organic matter, as “cold fire.”

Like a flame, saprophytic fungi break organic material into carbon compounds. Mycelium, the often unseen, root-like structure of the fungi, secretes digestive enzymes that release nutrients from the substrate it consumes. Whereas a flame destroys nearly all organic nitrogen, mycelium can fortify nitrogen where it’s needed in the forest floor.

“We do hundreds to thousands of acres of fire mitigation a year,” Ravage said.

Standard thinning costs somewhere around $3,000 per acre, about a third of which is spent hauling out or burning the slash. Using mycelium could drastically reduce that cost. With the right kind of fungi, Ravage said, “we can do in five years what nature could take 50 years to a century to do: create organic soil.”

Though the method is new, it’s not untried. At the Balcones Canyonlands Preserve, north of Austin, Texas, biologist Lisa O’Donnell deploys mycelium to combat invasive glossy privet that spills over from surrounding urban sprawl. After the intrusive trees are cut and piled, volunteers inoculate — or seed — them with native turkey tail fungi, which take about three years to transform hard logs into crumbly sponges.

Eventually, the woody material breaks down into a rich and water-retentive loam that O’Donnell uses to rebuild the Balcones’ deteriorated soils. “You don’t have to burn it or haul it out. You’re using that biomass, keeping it in place and recycling it,” she said. “You’re turning a negative into a positive.”

For mycelium to be a truly viable solution to wildfires, however, it would have to work at the scale of the Western landscape. Hedstrom is experimenting with brewing mycelium into a liquid that can be sprayed across hundreds of acres. “It’s a novel biotech solution that has great promise but is in the early stages,” he said.

Ravage doubts it could be so easy. “Half the battle is how you target the slash,” he said. Success stories like the Balcones are rare. Ravage has spent a decade cultivating wild saprophytes and perfecting methods of applying them in Colorado’s forests.

He begins by mulching slash to give his fungi a head start. Then he seeds the mulch with spawn, or spores that have already begun growing on blocks of the same material, and wets them down. Fungi require damp conditions and will survive in the mulch if it is piled deeply enough. Given the changing character of Western forests, however, aridity poses a serious hurdle.

At his lab in the Rockies, Ravage grows about a ton of spawn annually. To meet the demands of forest-fire mitigation, he wants to produce 12 tons every week. This presents an opportunity for intrepid mushroom farmers, should the government choose to fund them, but it’s not the only way agriculture could benefit. “There’s going to be a lot of wood chip waste continuously coming out of the forest,” said Andy Breiter, a rancher in Boulder County. “We can use those resources.”

Some Front Range farmers pay to truck in compost from Vermont. Instead of adding synthetic fertilizers or importing compost, Breiter is using Hedstrom’s mycelium to turn forest slash into organic soil that he can work into his degraded land. “I’m trying to increase the productivity of my land while recognizing that past systems of productivity created these problems to begin with,” Breiter said.


Stephen Robert Miller wrote this article for the Food and Environment Reporting Network.


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A group of Florida middle schoolers is tackling water pollution in an unconventional way - by collecting scientific samples while surfing and skateboarding. The SurfSkate Science program in South Florida, featured in the upcoming CBS series "The Visioneers," trains students to monitor water quality along coastal areas, with their data contributing to a national NOAA database. The Sunshine State's struggle with water quality and climate impacts has made it a laboratory for grassroots solutions, so intrepid host Zay Harding dives into a mission of discovery highlighting those working to protect the planet.

"There has got to be a way to make this exciting for them; how do we tie in skating or surfing with this? And so they are letting their kids do this and bring their friends and then educating them to being aware of it, and that's really what the whole series is about," he explained.

While this series circles the globe showcasing climate solutions - from Norway to Arizona - it keeps coming back to Florida, featuring three innovations, and that's no accident. With rising seas and record storms, Florida has become a lab for climate survival tactics. "The Visioneers" premieres Saturday at 9 a.m. EDT.

The series also features Miami-based Kind Designs, a startup fighting flooding with 3D-printed "living seawalls" that mimic mangrove roots. Harding said the founder, Ukrainian immigrant Anya Freeman, was inspired after years of wading through Miami's flooded streets.

"She said I've got to get my head around this and try to come up with a solution, and she's come up with these seawalls that are now protecting Florida. Yeah, it's these people who are getting mad, then making change," Harding continued.

The series showcases how everyone can contribute to climate solutions - from former lawyers to schoolchildren.

Thais Lopez Vogel, cofounder and trustee of VoLo Foundation, said the inclusive approach is key.

"Through emotions, through actions, through doing things. So I think this is a different way to tackle the climate crisis. We are trying to do it in every angle, and this one is going to be very, very effective," Vogel said.

The series comes as the state has seen a 5% increase in high-tide flooding since 2000, according to NOAA's 2024 Sea Level Rise Report, while a Florida Climate Institute study estimates coastal erosion costs $1.4 billion annually.

The U.S. Supreme Court this month declined to hear a case brought by youth activists, who argued the federal government has failed to protect them from climate change.

Minnesota teens are also elevating their voices on this topic. The court case was seen as a potential game-changer in highlighting the influence the fossil fuel industry has on federal policy.

Separately, a coalition of Minnesota high school students is pushing the Legislature to approve a bill that would bring climate justice education to classrooms in the state.

Wayzata High School Sophomore Ansh Shah said if his generation will have to help with solutions, they'll need the facts.

"We haven't had stuff taught to us on our own," said Shah. "We have to go out and we have to find all these information sources ourselves. And if we had, like, actual curriculum in schools, it'll make it a lot easier for people to be informed on this and actually want to make an effort."

The bill calls for a model program - consistent with state standards - with some focus on how marginalized communities often face the worst effects of climate change.

Similar to the national court case, the Minnesota effort has run into setbacks. Earlier proposals didn't gain traction in recent legislative sessions - and so far, this one hasn't received much attention.

But like their peers elsewhere in the country, these Minnesota students feel their effort will turn some heads, even if they're not always successful.

Fellow Wayzata Sophomore Vedanth Srinivasf said despite the urgent tone associated with climate change, it's important to think longer-term.

"Climate change isn't something that's going to be solved in the next 10 years," said Srinivasf. "It'll have to be solved in the next 50 years. So, starting right now, through small incremental steps, is a solution."

These students will be well into their professional careers by the time Minnesota is required to meet its goal of generating 100% carbon-free electricity in the state.

A landmark law signed by Gov. Tim Walz two years ago says that mandate has to be met by 2040.




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The Pacific Northwest Water Year Impacts Assessment, an important resource for managing drought and other climate extremes, was published today. The assessment tracks impacts of weather conditions on different sectors across Washington, Oregon and Idaho. The 2024 water year, which starts and ends in the fall, was Washington's fourth warmest in more than 100 years. Higher temperatures and low snowpack contributed to drought in much of the state, according to the new data.

Karin Bumbaco, climatologist and lead author of the assessment, says the research is helpful to understand cumulative impacts of drought on the region.

"Even though our snowpack is doing better now compared with last year, that really has to be seen through the lens of deficits from the previous year and even before," she explained.

Bumbaco added that in the last decade, droughts have been more frequent than usual in Washington. The assessment focuses on impacts of either too much or too little water on seven sectors, including agriculture, drinking water, fisheries and forestry.

Bumbaco said the agricultural sector in Washington reported the highest number of impacts from dry conditions last year.

"That can range from limited water availability, reduced crop yields. There was also quite a few reports about negative consequences for livestock and grazing," she continued.

Bumbaco said heat, fire and smoke forced recreation areas to close, and the drought brought increased insect activity and tree mortality. This is the fifth Water Year Assessment, and Bumbaco added that along with the challenges she has noticed more people working to mitigate impacts of a changing climate.

"There seems to be more climate resilience being built across our region. And people are taking actions to kind of avoid the worst impacts from either really wet conditions or really dry conditions," she said.

For example, she said farmers are changing crops, as well as the timing of irrigation, and monitoring water use and availability more closely. While some areas of the state saw reduced stream flow, increasing salmon mortality, the assessment was not all bad news. Bumbaco said a well-timed August rain supported a record salmon run in North Central Washington.





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