Fwd: How AI is reducing wildfire risks

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Loretta Lohman

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Nov 25, 2025, 10:17:08 AM (11 days ago) Nov 25
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Powerlines igniting trees is a major cause of destructive fires. So what’s a utility to do? Trim the trees using AI guidance

Today’s newsletter explores programs across two continents that could help save power providers billions by reducing their liability. We also present two different solutions for regrowing forests after a wildfire.

The first is known as Muvuca, or ‘chaotic mix’ in Brazilian Portuguese, and involves using agricultural methods to plant a mix of seeds from native species. It copies the variety of nature with a twist — the seeds are already adapted to a hotter world. The second falls under the umbrella of Al Gore’s Generation Investment Management and has attracted $200 million in new money. Scroll down to find out how it will be invested.

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Digital lumberjacks

By Lauren Rosenthal and Joe Wertz

On the hunt for cheap and fast strategies to prevent deadly wildfires, utilities across the US and Europe are contracting with a handful of artificial intelligence startups to map wildfire risk along thousands of miles of power lines, picking out individual trees to cut and poles to replace.

The most obvious way to prevent power equipment from sparking a blaze is to bury lines underground. But at a cost of upwards of $3 million a mile, many investor-owned utilities are limiting themselves to just a few hundred miles of buried lines per year. That’s proved to be a major business opportunity for several tech companies that use machine learning to deliver custom recommendations for targeted, relatively low-cost fixes — including some that can be paid for from maintenance budgets.

Workers clear trees near power lines in Berkeley, California. Source: Smith Collection/Gado/Sipa/AP/SIPAPRE

Take Massachusetts-based Overstory, which analyzes high-definition satellite images to spot trees that are most likely to topple or drop a limb on power distribution lines — those most in need of trimming. The company started out making tools to find and discourage deforestation, said Chief Executive Officer Fiona Spruill. Overstory pivoted after a realization: “We could have a huge impact from a climate standpoint, in that we could help prevent wildfires,” she said. The company recently closed an oversubscribed Series B funding round that pulled in more than $43 million.

Overstory’s clients now include American Electric Power Co.’s Texas utility and California’s Pacific Gas & Electric Co., along with other major US utilities, Spruill said. UK-based National Grid Plc, meanwhile, has signed a deal with Rhizome, a San Francisco-based climate tech firm, for custom modeling to suggest investments in fire safety.

The stakes for utilities are high: Edison International’s Southern California utility is facing lawsuits for its possible link to the Eaton fire in Altadena, which  killed 19 people in January. Wildfire liability from deadly blazes in Northern California pushed PG&E to declare bankruptcy in 2019.

To train its AI, Overstory relied on a large team of arborists who contributed on-the-ground measurements and observations of diseased or dying trees. The company’s data and risk predictions are loaded into a custom web platform, with suggestions for what to trim and how often.

Overstory's fuel detection model  Photographer: Overstory

Rhizome’s gridFIRM model can parse an array of site-specific information about a given grid, including local weather trends and maintenance records, and factor in information about nearby properties and populations that would be impacted in a fire.

While these technologies have the potential to lower fire risk, they can’t eliminate it entirely. 

“There’s always going to be some risk of ignition unless we spend just extraordinary amounts of money” to bury all distribution lines, power systems researcher Duncan Callaway, who leads University of California, Berkeley’s Energy and Resources Group said. “If that cost is making it difficult for people to pay their bills, which is certainly already front of mind, at some point you have to live with the discomfort of some residual risk.”

Read the full story, including how National Grid is already using Rhizome’s technology in the US.

More wild wildfires

43%
The percentage of the worlds most destructive fires that have occurred in the past decade. Rising temperatures are making forests more flammable.

Another way to mitigate risk

“Utilities now fear that if they don’t have these programs in place, they will be found liable and potentially recklessly negligent.”
Michael Wara
Director, Stanford University Climate and Energy Policy Program
In addition to trimming trees and burying lines, utilities have also turned to cutting power when fire conditions are particularly extreme.

A grassroots rewilding method

By Renata Carlos Daou

Muvuca, in Brazilian Portuguese, means a “chaotic mix.” In agriculture, it’s a method to restore the forest around headwaters of rivers and streams by planting a mix of seeds from dozens of native species, to copy the variety of nature. 

It promotes the growth of native vegetation — expanding an area’s ability to capture carbon — and also prepares these new forests for climate change, because the mix includes seeds from areas that are already adapted to a hotter world.

“The thing is, nature was already doing it on its own,” says Eduardo Malta, a forest restoration expert who helped spread the practice beyond a few communities in the center of Brazil. “We saw that the family farmers in that region were also already using direct seeding in their settlements, on their farms, and we saw the results.”

As part of hosting this year’s COP30 climate talks, Brazil spearheaded an ambitious project to create a reforestation fund called the Tropical Forest Forever Facility. Its goal was to raise an initial investment of $25 billion, which it then lowered to $10 billion. As the conference wraps up, the country has secured about $5.5 billion from Norway, France and Indonesia, with Germany pledging to contribute another €1 billion (about $1.15 billion) over the next decade. 

As COP negotiators wrangle over funding to curb emissions and protect the world from climate change, muvuca is a grassroots effort that’s already restoring Brazil’s native vegetation. The Instituto Socioambiental (ISA), the non-profit where Malta works, is helping thousands of people collect seeds from the forest and farmlands and sell them to companies and farmers who need them to comply with reforestation laws. 

Read the full story on Bloomberg.com and subscribe for unlimited access to news on how to regrow forests.

A $200 million restoration bet

By Alastair Marsh

A venture set up by Al Gore’s Generation Investment Management has attracted $200 million in new money for a strategy that targets the restoration of land degraded by farming and deforestation.

Al Gore Photographer: Naina Helén Jåma/Bloomberg

Just Climate, which was established by Generation in 2021, got allocations from investors including Royal Bank of Canada, Achmea Investment Management and the Environment Agency Pension Fund, it said in a statement on Tuesday. The money will be deployed in its natural climate solutions initiative, and comes on top of $175 million raised earlier this year. 

The venture, which counts Microsoft Corp.’s Climate Innovation Fund and the California State Teachers’ Retirement System as anchor investors, is trying to allocate capital into areas it’s identified as falling through the cracks of environmental investment strategies.

Read the full story on Bloomberg.com.

More from Green

An abandoned lighthouse in Nassau, Bahamas Photographer: Scott McIntyre/Bloomberg

A boutique private-credit firm set up by former Credit Suisse bankers has agreed to provide a lending facility to support a new carbon program in the Bahamas.

Under the plan, the Bahamas will invest in protecting its marine environment, which will form the basis of carbon credits to be sold under Article 6 of the Paris Agreement. ArtCap Strategies is providing a $25 million facility to help kickstart the Bahamas Sovereign Carbon Facility, which is seeking to mobilize up to $1 billion of financing within the next 12 months, said Antonio Navarro, a managing partner at the firm, in an emailed reply to questions. 

The framework for Article 6 carbon credits was finalized at COP29 in Baku last year. So far, the program has seen little trading activity. The Bahamas is expected to generate “substantial revenues from the sale of high-integrity blue carbon credits” over the next five years, ArtCap said in a statement. The “blue” credits are designed to help with the conservation and restoration of seagrass meadows, it said.

Read the full story on Bloomberg.com and subscribe to Green Daily for more news on how markets and countries are implementing Article 6.

This week’s Zero

Over the last two weeks, tens of thousands of people took to the city of Belem, at the mouth of the Amazon River, for the annual United Nations climate summit: COP30. Alongside tense negotiations, there were Indigenous protests, daily rainstorms and even a fire at the COP venue. But at the end of it all, what did COP30 achieve? Bloomberg Green’s Jennifer Dlouhy joins Akshat Rathi on Zero, to share her takeaways.

Listen now, and subscribe on AppleSpotify or YouTube to get new episodes of Zero every Thursday.

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