Do you have plans this Saturday—Flag Day? Might you like to participate in a peaceful demonstration in your area celebrating democracy and rejecting authoritarianism? Organizers expect many millions to participate in over 1,500 cities. Please consider joining me in this peaceful protest.

Consider joining the one of 1,500 peaceful demonstrations across the U.S.

Meanwhile President Trump is having a $45 million military parade in Washington, D.C., on Saturday which is also his birthday. This cost can be contrasted to his administration’s devastating cuts to scientific research and other programs that benefit the health and environment of our country and the world. For more about why you should consider participating, check out this opinion piece or this Paul Krugman article.

Check out an online exhibit with my 1970 Denali
gear

On a happier note, I am pleased to share with you my video interview in the American Alpine Club (AAC) Legacy Series to “pay tribute to the visionary climbers who made the sport what it is today.” You might also enjoy this online exhibit from the AAC featuring my story, gear, and photographs from our 1970 first women’s ascent of Alaska’s Denali as recounted in my memoir Breaking Trail: A Climbing Life.

During my AAC interview I recounted some mountaineering stories and their overlap
with our current science and policy work. I also compared the challenges of our work with those of climbing high peaks in my recent Forbes article Why Are There Cancer-Causing Chemicals In Our Cars?

The same flame retardants my research helped remove from kids’ pajamas in 1976 while I was climbing Mt. Everest during the American Bicentennial Expedition are now in our cars—with no demonstrated fire safety benefit. Our Institute is collaborating with Consumer Reports and the International Association of Firefighters to change a 1970 flammability standard. Due to this standard, our study found cancer-causing flame retardants in all 101 cars from 22 brands that we tested!

Flame retardants are also being detected in children’s mattresses, as reported in our recent joint study with the University of Toronto. Read more about it in my newest Forbes article. The UK’s mattress trade association reacted to the study by issuing guidance for its members, and a leading US foam certification body has reached out to the paper’s authors to discuss how manufacturers can best test for and eliminate harmful chemicals in their supply chains. We are delighted that our study is prompting movement to children’s mattresses without these problematic chemicals.

Finally, here are two videos about PFAS I enjoyed. “How One Company Secretly Poisoned The Planet” and “A Little Story About Forever.”

And a last note: We will be having a farewell to our North Berkeley office gathering on Saturday afternoon, June 28. Please write me for an invitation if you’d like to join us to share food, drink, and conversation as well as possibly take home a desk, chair, a very large video screen, or other free office items.

Happy summer,
Arlene

P.S. There is an opening for one or two people on a snorkeling and/or scuba adventure trip to explore the rich undersea reefs of Alor Indonesia July 1-11, 2026. Please get in touch ASAP if you might like to join me and my friends.
P.P.S. If you have dreamed of trekking in the Himalayas, I’d recommend the excellent services of my long-time guide Chandra Subba and Himalayan Icefall Trekking. You can email Chandra at: himtrekzone@gmail.com. More information below.

Institute Senior Fellows Retreat

During our first retreat in Bolinas, California, our Senior Fellows identified opportunities to collaborate, support, and complement each other’s work and enjoyed reading, thinking, bird watching, and walking, all in a beautiful setting.

From left: Lauren Heine, Joel Tickner, Arlene Blum, Meredith Williams, and Susan Kegley

Meredith Williams is working to find integrative approaches to addressing plastics, petrochemicals, toxics, and climate.
Lauren Heine is investigating reducing the use of harmful additives in plastics by developing standards and/or criteria to restrict their use in products.
Joel Tickner is developing strategic levers to scale improved chemical manufacturing processes and products that reduce adverse climate and toxicity impacts with the objective of moving the chemical industry towards a more sustainable and circular future.
Susan Kegley is studying agricultural pesticides in collaboration with commercial beekeepers to develop solutions to recent honeybee colony losses of up to 90% which threaten pollinator-dependent crops such as almonds, fruits, and vegetables.
Arlene Blum is continuing her efforts to reduce harm from organohalogens including the unnecessary use of flame retardants inside vehicles and in plastic enclosures around lithium ion batteries, as well as antimicrobials in consumer soaps.

We All Scream for Sunscreen

With summer just beginning, we are looking for effective sunscreens that do not contain harmful ingredients. This is a challenging topic.

                              Selecting sunscreens is not so easy

Here’s some helpful advice from Marty Mulvihill of Safer Made and our Institute’s Advisory Board: “The FDA recommends mineral sunscreens as a safer choice. They state that the only safe and effective sunscreen ingredients that meet their criteria are zinc oxide and titanium dioxide. These mineral ingredients are also the only ones considered “Reef Safe.”

See the Safer Made chapter on UV Filter ingredients. Some brand recommendations: “All Good and Badger are among the best.”

People can also use the free Clearya mobile app as described below to select better
sunscreens and personal care products. You can find suggestions for other
recommended sunscreen without harmful ingredients at:

• National Geographic Seven of the Best Reef Safe Sunscreens (Not the spray)
• Surfrider Foundation Guide to Reef Friendly Sunscreens
• Consumer Reports Best Mineral Sunscreens of 2025

Surfrider, a nonprofit focused on healthy reefs and oceans, makes the following recommendations:

1. Check the label. Make sure your sunscreen does not contain the following harmful substances on the HEL list: Oxybenzone, Octinoxate, Octocrylene, 4-
methylbenzylidene camphor, PABA, Parabens, Triclosan, any sort of microplastic, such as “exfoliating beads,” nanoparticles, or “nano-sized” zinc or titanium.
2. Use lotions rather than spray or misting sunscreens. The propellants can be harmful to you and the environment.

A friend who leads the Surfrider Foundation in Kauai, Hawaii, shared her strategy: “I am concerned about the ingredients in sunscreens so I usually wear big hats and long sleeved shirts and stay out of the midday sun.”

Peregrine Falcons Expose Lasting Harms of Flame Retardant Use

Peregrine falcon populations across North America are heavily contaminated with harmful flame retardants–including those that have been phased out for years–according to a new study published in Environmental Science & Technology.

                Falcons are canaries in a coal mine

Researchers measured concentrations of a suite of old and newer halogenated flame retardants in peregrine falcon eggs collected from multiple locations in the U.S. and Canada between 1984 and 2016. It is the largest investigation to date of flame retardants in peregrine falcons in terms of both time and space. In these falcons, polybrominated diphenyl ethers (PBDEs) were the most commonly detected flame retardants and had the highest concentrations.

Despite the fact that production of the major PentaBDE and DecaBDE mixtures ceased in North America by the end of 2004 and 2013, respectively, PBDE concentrations did not decline over the study period in most regions. Similarly, although hexabromocyclododecane (HBCDD) has been phased out from the North American market since 2012, it was detected in the majority of eggs and concentrations did not decrease over the study period in any of the regions.

Continued exposure to old flame retardants comes from the release of these chemicals from in-use and discarded products produced before the phase-outs. Further, many flame retardants released from products accumulate up marine and terrestrial food chains over time, making apex predators like peregrine falcons more likely to build up high concentrations in their tissues. Bird flu is also contributing to the recent decline in peregrine falcons. Coastal falcons hunting waterfowl (which can carry bird flu) are the most vulnerable.

Peregrine falcons are not the only species harmed by flame retardants. Our “Flame Retardants in Wildlife” map shows more than 150 species of wild animals contaminated with flame-retardant chemicals. Polluted wildlife includes killer whales, red pandas, chimpanzees and other endangered species.

Dirty Chemicals Don’t Belong in Clean Energy Solutions

by Rebecca Fuoco

Lithium-ion batteries are a key part of our growing clean energy infrastructure, with uses in electric cars and electronics (e.g., cell phones, medical devices, smart watches, or laptops). Demand is anticipated to grow exponentially over the next decade. Unfortunately, PFAS are widely used in these batteries, and a new peer-reviewed study has confirmed that this is leading to significant air and water pollution.

       Can energy really be clean if it uses PFAS?

The authors further found that novel PFAS, called bis-perfluoroalkyl sulfonimides (bis-FASIs), demonstrate environmental persistence and ecotoxicity comparable to notorious phased out compounds such as PFOA. Another study just published identified 25 different PFAS around a lithium-ion battery recycling facility.

With PFAS in batteries escaping into the environment from the beginning to the end of their lifecycles, increased attention to chemical usage is needed for a safe clean energy transition. We encourage companies to develop batteries and other clean energy solutions without PFAS or other harmful chemicals (and congratulate the start-ups who are already doing so!)

Want to Go Trekking in Nepal?

                                  Time for a trek?

I met Chandra in 2000 when my daughter was attending Lincoln school in Kathmandu and he took her 8th grade class trekking. Since then, I’ve enjoyed a dozen trekking adventures in Nepal under his leadership.

Chandra’s company has excellent trips with great food, gear, and guides. He provides personalized itineraries and attention for individual travelers, small and large groups for reasonable prices.

To plan a trip customized to your interests, abilities, and timing you can contact Chandra at himtrekzone@gmail.com. Please email me if you have questions.

Arlene and the Green Science Policy Institute in the News

by Rebecca Fuoco

We communicate our science to a wide audience. You can too.

Below are recent news articles, blogs, podcasts, newsletters, and more that have featured our Institute’s work and expertise.

• Our joint study on harmful chemicals in children’s mattresses received extensive media coverage, including in by CNN, CBS News, CBC News, Toronto Star, People magazine, The Hill, Consumer Reports, The Cool Down, Dallas Express, and more.
• The paper we co-authored finding unregulated polymers break down into smaller toxic chemicals was covered by Inside Climate News, Environmental Health News, The Cool Down, The New Lede, Technology Networks, Earth.com, and more.
• ABC News Sacramento covered the California Safer Soap Act, for which our Institute is providing scientific support.
• Arlene was interviewed by the radio station KPFA.
• Arlene was interviewed by CBC News about Canada’s ban of PFAS in clothing.
• An article in Homes & Gardens about reducing toxics in the home recommends our Six Classes website as a resource.
• A Health magazine article on reducing exposure to PFAS lists our PFAS-free webpage.
• In a feature about the continuing harms of PBBs in Michigan, Environmental Health News recommends our website as a resource for learning more about flame retardants.
• An article in Gadget Review recommends that people who want PFAS out of their outdoor gear to support our organization.
• An op-ed in The Revelator linked to our information on PFAS in firefighting foams.
• The Cool Down, picked up by Yahoo News, wrote an article about our research on flame retardants in lithium-ion batteries.