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.


get more stories like this via email

New polling shows most Americans still favor non-fossil fuel energy sources, but support for certain renewables is not quite as strong these days and a Wisconsin expert hopes the direct impacts of climate change bolster messaging.

The Pew Research Center is out with a new public opinion report on energy choices. Among those surveyed, 63% support the U.S. taking steps to become carbon-neutral by 2050. But support for expanding wind and solar development has gone down from well past 80% to around 75%.

Dr. Ciaran Gallagher, energy and air manager for the climate nonprofit Clean Wisconsin, feels it is important to remind residents climate change is happening at their doorstep.

"We can point to the drought that affected our farmers last summer and then in stark comparison, the intense rain and flooding events we've been experiencing this spring and summer," Gallagher explained.

She mentioned last summer's smoky air from Canadian wildfires as another example. Advocates said such events might help convince the public to regain confidence in renewables as policymakers try to limit climate disasters. Local opposition has surfaced for various solar and wind projects. Gallagher acknowledged it is not surprising, adding misinformation and polarization are driving changing attitudes.

Grid operators warn as more coal plants and other fossil sources come offline to meet clean energy goals, reliability issues might surface in the short term as energy demand soars. But Gallagher countered it does not mean wind and solar are failing to keep the lights on.

"These last few winters, the energy source that has failed is gas power plants," Gallagher pointed out. "Solar and wind in some of the recent storms have outperformed more than they (were) expected (to)."

The Federal Energy Regulatory Commission points out in a 2022 winter storm affecting parts of the Midwest, 90% of prolonged outages were linked to fossil sources.

The Pew survey also showed Americans are not quite as eager to purchase an electric vehicle compared with a few years ago. Gallagher echoed predictions from agencies such as the Bureau of Labor Statistics which indicate organic growth will still happen. She added people taking advantage of federal incentives right now to bring EVs within reach are likely to spur word-of-mouth.

"We're going to see these numbers continue to grow as more people talk to their friends and families that have been early adopters of these technologies," Gallagher predicted.


get more stories like this via email

A new poll shows Idahoans support the development of more clean energy in the state.

In February, 500 likely Idaho voters were surveyed.

Jillian Hanson, climate and renewable energy program manager for The Nature Conservancy in Idaho, said clean energy was a winning issue in this poll.

"Sixty-four percent of Idahoans agree we can both increase the production of clean energy while preserving natural areas, wildlife habitat and the character of our communities," Hanson reported.

Hanson noted 64% of participants in the survey agreed clean energy is economically beneficial for communities, bringing lower energy prices and jobs. The poll was conducted by GS Strategy Group on behalf of The Nature Conservancy in Idaho.

Hanson emphasized proper planning is integral to clean energy production. Last year, The Nature Conservancy released its Power of Place report. It lays out how renewable energy can be developed while still preserving natural and working lands.

Hanson stressed the report shows it is possible and one important element is getting local residents involved.

"In all of this planning conversation, too, robust community engagement is very important from the outset," Hanson asserted. "Engagement that prioritizes community benefits and responds to community concerns."

Hanson noted clean energy can have economic benefits and low impacts on nature at the same time.

"Clean energy technology can provide reliable energy to communities at a marginal cost increase," Hanson added. "It can also create economic opportunities, like in the form of jobs, U.S. manufacturing and more."

Tomorrow Minnesota will reopen online applications for electric bike rebates.

Environmental advocates are closely watching consumer demand for these products, in hopes they'll play a role in emissions reductions.

The state Commerce Department is launching the application period, after a technical issue forced it to shut down the portal last month soon after going live.

The rebates of up to $1,500 are expected to go quickly, and that's welcome news to Lena Reynolds - communications and policy advocate for the Environmental Law and Policy Center.

She said having more e-bikes replace gas-powered vehicles for shorter trips bodes well for improving air quality.

"In places that have done e-bike rebate programs like this before," said Reynolds, "I know Denver, their average participant replaced 22 miles of car trips a week. So, that's a lot of gas that they're not burning."

Research is still coming together on just how much of a dent e-bikes would make in reducing transportation emissions.

But the Policy Center says even when factoring in the manufacturing and charging requirements, an e-bike's climate impact is 93% lower per mile than a fossil-fueled car.

While rebate programs are emerging, the purchase price is still seen as a barrier.

Other policy experts think more coordination is needed in crafting regulations to keep riders and those around them safe.

Reynolds agreed that steps like adding off-street trails could bring a level of balance toward this growth.

As for skeptics who say charging an e-bike still creates a carbon footprint, she said it isn't as bad as they might think.

"And in Minnesota, it's even better," said Reynolds. "Renewables generate the largest share of Minnesota's electricity. So, you know, riding an e-bike is even more sustainable in Minnesota than it would be in other states where fossil fuels are a larger portion of the electricity mix."

When looking at the rebates, Minnesota's discount is 50% to 75% of a buyer's qualifying expenses, depending on their income.

The state of Michigan just adopted a similar program. And just like Denver, Reynolds noted that some cities are offering their own rebates - including Columbus, Ohio.




get more stories like this via email