
The nation's new chemical safety law promises to give the U.S. Environmental Protection Agency (EPA) expanded authority to regulate hazardous chemicals in consumer products. But of the tens of thousands of chemicals on the market, most never tested for safety, which should the EPA tackle first?
Today, the Environmental Working Group (EWG) released a list of high priority chemicals the EPA should act on quickly. It includes chemicals in products Americans use every day—detergents and household cleaners, clothes, mattresses, furniture, toys and even kids' jewelry.
The Environmental Working Group released a list of high priority chemicals the EPA should act on quickly.
"After decades of stagnation, EPA can now ban or restrict the use of toxic chemicals and order companies to conduct safety testing when more information is needed," EWG senior scientist David Andrews said. "It's important that the agency act promptly to eliminate or reduce Americans' exposure to industrial compounds linked to cancer, birth defects, hormone disruption and other health problems."
For many chemicals on the list, action is long overdue. For example, many Americans believe asbestos—a carcinogen that claims 12,000 to 15,000 lives each year—was banned decades ago, as it has been in 55 other nations. But U.S. industry still imports, uses and sells asbestos and asbestos products, including automobile brake pads and clutches, vinyl tile and roofing materials.
With so many hazardous chemicals in use, any list of those posing the greatest risks would be subjective and incomplete. But the vast catalogue of chemicals that have never been evaluated for safety make it urgent for the EPA to move quickly to tackle the backlog. The agency put 90 chemicals known to pose health risks on a list called the TSCA [Toxic Substances Control Act] Work Plan.
"The work plan list represents opportunities for assessment and regulation where EPA action is overdue," EWG senior scientist Johanna Congleton said. "In some cases, such as with some kinds of flame retardants, the initial EPA review was hindered by the lack of safety and exposure data. EPA must now use its expanded authority to fill in these critical information gaps."
EWG scientists scrutinized the chemicals on the work plan, analyzed studies by U.S. and international researchers and consulted fellow experts in environmental health. They considered each chemical's health risks, how widely Americans are exposed to it and the likelihood of EPA action under the new law.
Here are the 10 chemicals EWG urges the EPA to thoroughly review and regulate as soon as possible:
1. Asbestos
The cancer-causing substance is still found in automobile brake pads and clutches, vinyl tiles and roofing materials. While some uses have been banned since 1989, no new risk assessment is scheduled.
2. PERC
This probably carcinogen appears in dry-cleaning fluid, spot removers and water repellents.
3. Phthalates
These chemicals are linked to early puberty in girls and other reproductive harm. They show up in PVC plastic, toys and plastic wrap.
4. BPA
This carcinogen is also linked to infertility, developmental harm and diabetes. BPA is used in food cans and other food containers and cash register receipts.
5. Chlorinated phosphate fire retardants
These chemicals turn up in upholstered furniture, foam cushions, baby car seats and insulation. They are linked to possible nerve and brain damage.
6. TBBPA and related chemicals
This potential carcinogen and endocrine disruptor is seen in electronics, auto parts and appliances.
7. Brominated phthalate fire retardants
These chemicals are linked to developmental toxicity and appear in polyurethane foam for furniture and baby products.
8. 1-Bromopropane
This probable carcinogen is used in aerosol cleaners and adhesives and linked to reproductive harm.
9. DEHA
This probable carcinogen is found in plastic wrap and PVC plastic. It is also linked to developmental toxicity.
10. P-dichlorobenzene
This probable carcinogen is detected in moth balls and deodorant blocks. It is linked to liver and nerve damage.
EWG, from EPA's 2014 TSCA Work Plan
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By Aaron W Hunter
A chance discovery of a beautifully preserved fossil in the desert landscape of Morocco has solved one of the great mysteries of biology and paleontology: how starfish evolved their arms.
The Pompeii of palaeontology. Aaron Hunter, Author provided
<h2></h2><p>Although starfish might appear very robust animals, they are typically made up of lots of hard parts attached by ligaments and soft tissue which, upon death, quickly degrade. This means we rely on places like the Fezouata formations to provide snapshots of their evolution.</p><p>The starfish fossil record is patchy, especially at the critical time when many of these animal groups first appeared. Sorting out how each of the various types of ancient starfish relate to each other is like putting a puzzle together when many of the parts are missing.</p><h2>The Oldest Starfish</h2><p><em><a href="https://www.biorxiv.org/content/10.1101/216101v1.full.pdf" target="_blank" rel="noopener noreferrer">Cantabrigiaster</a></em> is the most primitive starfish-like animal to be discovered in the fossil record. It was discovered in 2003, but it has taken over 17 years to work out its true significance.</p><p>What makes <em>Cantabrigiaster</em> unique is that it lacks almost all the characteristics we find in brittle stars and starfish.</p><p>Starfish and brittle stars belong to the family Asterozoa. Their ancestors, the Somasteroids were especially fragile - before <em>Cantabrigiaster</em> we only had a handful of specimens. The celebrated Moroccan paleontologist Mohamed <a href="https://doi.org/10.1016/j.palaeo.2016.06.041" target="_blank" rel="noopener noreferrer">Ben Moula</a> and his local team was instrumental in discovering <a href="https://www.sciencedirect.com/science/article/abs/pii/S0031018216302334?via%3Dihub" target="_blank" rel="noopener noreferrer">these amazing fossils</a> near the town of Zagora, in Morocco.</p><h2>The Breakthrough</h2><p>Our breakthrough moment came when I compared the arms of <em>Cantabrigiaster</em> with those of modern sea lilles, filter feeders with long feathery arms that tend to be attached to the sea floor by a stem or stalk.</p><p>The striking similarity between these modern filter feeders and the ancient starfish led our team from the University of Cambridge and Harvard University to create a new analysis. We applied a biological model to the features of all the current early Asterozoa fossils in existence, along with a sample of their closest relatives.</p>Cantabrigiaster is the most primitive starfish-like animal to be discovered in the fossil record. Aaron Hunter, Author provided
<p>Our results demonstrate <em>Cantabrigiaster</em> is the most primitive of all the Asterozoa, and most likely evolved from ancient animals called crinoids that lived 250 million years before dinosaurs. The five arms of starfish are a relic left over from these ancestors. In the case of <em>Cantabrigiaster</em>, and its starfish descendants, it evolved by flipping upside-down so its arms are face down on the sediment to feed.</p><p>Although we sampled a relatively small numbers of those ancestors, one of the unexpected outcomes was it provided an idea of how they could be related to each other. Paleontologists studying echinoderms are often lost in detail as all the different groups are so radically different from each other, so it is hard to tell which evolved first.</p>President Joe Biden officially took office Wednesday, and immediately set to work reversing some of former President Donald Trump's environmental policies.
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