2024 Caps a Decade of Record-Breaking Heat

In a message ahead of the new year, United Nations Secretary-General António Guterres warned that 2024, which is expected to soon be confirmed as the hottest year on record, is just one of many record-breaking years for high temperatures over the past decade.

“Throughout 2024, hope has been hard to find. Wars are causing enormous pain, suffering and displacement. Inequalities and divisions are rife — fueling tensions and mistrust. And today I can officially report that we have just endured a decade of deadly heat,” Guterres said. As part of his message, the secretary-general warned that the previous decade has broken records for extreme heat.

“The top ten 10 hottest years on record have happened in the last 10 years, including 2024,” Guterres continued. “This is climate breakdown — in real time. We must exit this road to ruin — and we have no time to lose.”

The World Meteorological Organization (WMO), which is part of the UN, recently reported that 2024 is set to be named the warmest year ever recorded. The official global temperature for 2024 will be published in January, the organization reported.

Following this news, scientists are urging immediate action to safeguard the planet against the most catastrophic effects of climate change, especially as the world is already experiencing more intense and more frequent extreme weather events.

“This year we saw record-breaking rainfall and flooding events and terrible loss of life in so many countries, causing heartbreak to communities on every continent,” WMO Secretary-General Celeste Saulo said in a statement. “Tropical cyclones caused a terrible human and economic toll, most recently in the French overseas department of Mayotte in the Indian Ocean. Intense heat scorched dozens of countries, with temperatures topping 50°C on a number of occasions. Wildfires wreaked devastation.”

For 2025, WMO will focus heavily on cryosphere preservation, or preserving sea ice, ice sheets and other frozen parts of Earth. As NASA reported in September 2024, both Arctic and Antarctic ice reached near record lows for 2024, with Antarctica experiencing low ice levels even in the coldest months of the year for the Southern Hemisphere.

Earlier this month, the National Oceanic and Atmospheric Administration (NOAA) reported that for the first time in thousands of years, the Arctic was emitting more carbon than it was storing as a response to record-breaking temperatures, ice loss and wildfires.

Further, a recent report by the World Weather Attribution and Climate Central detailed severe impacts from climate change-related extreme weather events, which led to the premature deaths of at least 3,700 people and the displacement of millions of people in 2024. According to the report, climate change made 26 of 29 analyzed extreme weather events worse this year. Extreme heat in particular was made significantly worse by climate change, with an additional 41 days of dangerous heat in 2024, the report found.

Guterres has warned that countries will need to unite to protect people and the planet moving forward.

“In 2025, countries must put the world on a safer path by dramatically slashing emissions, and supporting the transition to a renewable future,” Guterres said. “It is essential — and it is possible.”

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New York to Charge Biggest Emitters for Climate Damages Under New Law

New York Governor Kathy Hochul has signed the Climate Change Superfund Act, which requires major emitters, such as fossil fuel companies, to compensate for damages by helping to fund climate-resilient infrastructure projects.

“By signing the Climate Change Superfund Act, Gov. Hochul is addressing the financial burden placed on New Yorkers by the fossil fuel companies,” Richard Schrader, director of New York Government Affairs at Natural Resources Defense Council (NRDC), said in a statement. “It’s a key example of what putting fiscal fairness and environmental justice front and center looks like. The funds raised by this measure will allow for investment in life-saving infrastructure improvements: safeguarding coastal communities from flooding, creating systems to protect people from extreme heat, and improving responses to environmental and public health threats.”

As ABC News reported, the law will require companies with the highest greenhouse emissions from 2000 to 2018 to pay fines, with that money going to extreme weather event repairs and infrastructure upgrades.

According to Environmental Advocates NY, funding collected through the act will go toward projects such as wetland restoration, upgrades to storm water drainage systems and installations of energy-efficient cooling in both public and private buildings. The organization reported that a minimum of 35%, with a target of at least 40%, of collected funds will go to projects in disadvantaged communities.

“The Climate Change Superfund Act is now law, and New York has fired a shot that will be heard round the world: the companies most responsible for the climate crisis will be held accountable,” said New York Sen. Liz Krueger, a sponsor of the bill. “The planet’s largest climate polluters bear a unique responsibility for creating the climate crisis, and they must pay their fair share to help regular New Yorkers deal with the consequences.”

According to Sen. Krueger, costs of climate change-related extreme weather events in New York will reach more than $500 billion by 2050, averaging around $65,000 per household. The bill will require fossil fuel companies to pay a total of $75 billion over a 25-year time frame.

The fines will not go into effect immediately, ABC News reported. The state will first need to establish regulations around notifying companies, collecting fines and allocating funds to projects.

In the meantime, experts expect the law to face legal challenges, ABC News reported. Fossil fuel industry professionals have spoken out against the law, with the American Petroleum Institute stating, “This type of legislation represents nothing more than a punitive new fee on American energy, and we are evaluating our options moving forward.”

New York is now the second U.S. state to enact such a law. Vermont passed a similar law in May 2024, The Associated Press reported.

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Spain’s MetroCHARGE Powers EVs With Energy Recovered From Barcelona Subway Train Brakes

In Barcelona, energy from train brakes that could otherwise be wasted is now being harvested to charge electric vehicles.

As part of Spain’s MetroCHARGE project, 16 subway stations in Barcelona use brake energy recuperators to redirect energy from the train brakes to EV charging stations on the streets, The Associated Press reported.

Regenerative braking is not a new concept, especially for trains. But the move to transport the energy from the brakes through cables to electric vehicle chargers is an innovative way to supply power to charging stations.

The Metro Barcelona underground Provença transit station on Feb. 19, 2022. Boarding1Now / iStock Editorial / Getty Images Plus

According to the Transports Metropolitans de Barcelona (TMB), the main transportation operator in Barcelona, the MetroCHARGE project uses a combination of the brake energy recuperators on select trains as well as five solar power plants and a combination of ultra-fast and semi-fast EV chargers to harness clean energy and create a self-sufficient EV charging network.

“We’re trying to take advantage of the power that’s already in the metro system and use that spare energy to feed EV chargers on the street,” said Marc Iglesias, head of sustainable mobility at Àrea Metropolitana de Barcelona, a collaborator on the MetroCHARGE project, as reported by Grist.

An EV charging station on a street in Barcelona. AlvaroRT / iStock / Getty Images Plus

In addition to the brake energy going to EV chargers, it also helps power nearby lights and passenger escalators, Grist reported. In total, the MetroCHARGE program meets all energy needs for 28 of 163 subway stations in Barcelona, The Associated Press reported. The project cost 7.3 million euros ($7.6 million), an amount that the program is estimated to recover in energy savings in about four years. The regenerative braking system is further expected to save around 3,885 metric tons of carbon dioxide per year.

The regenerative braking project not only provides cleaner energy to EV chargers, but it could also lower charging rates for users.

“Since the recharging stations are installed nearby, the energy, instead of being put back into the general electric network, goes directly to the charging stations, and that allows the provider to potentially offer lower prices,” Alvaro Luna, a professor of electrical engineering at the Polytechnical University of Catalonia, told The Associated Press. “We can say that the innovation is one of urban planning, of being able to bring together energy uses within a city.”

About 2.3 million riders use the Barcelona metro system each weekday, The Associated Press reported, and locals and tourists take around 440 million trips on the metro system per year, according to Grist.

While the MetroCHARGE project is a step in the right direction for greener transportation and energy, there is more work to be done. As The Associated Press reported, Spain missed its goal of installing 100,000 EV charging stations by 2021, as it has only around 37,000 now. The country will need to ramp up installations to meet a growing demand for EVs. According to Statista, demand for EVs in Spain is expected to reach an annual growth rate of 14.94% through 2029.

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Scientists Develop Method to 3D-Print Concrete That Captures Carbon

A team of scientists from Nanyang Technological University, Singapore (NTU Singapore) has developed a method of 3D printing that can also capture carbon dioxide and store it in concrete.

The process involves injecting carbon dioxide and steam into mixing cement, which is then used in a 3D printer to build structures. For this method, the team sourced both the steam and the carbon dioxide as byproducts of industrial processes. The 3D printer was connected to a steam jet and carbon dioxide pumps in order to incorporate these elements into the mixing concrete.

“The building and construction sector causes a significant portion of global greenhouse gas emissions. Our newly developed 3D concrete printing system offers a carbon reducing alternative by not only improving the mechanical properties of concrete but also contributing to reducing the sector’s environmental impact,” Tan Ming Jen, principal investigator of the study and professor at NTU’s School of Mechanical and Aerospace Engineering, said in a statement. “It demonstrates the possibility of using CO2 produced by power plants or other industries for 3D concrete printing. Since traditional cement emits a lot of carbon, our method offers a way to plough back CO2 through 3D concrete printing.” 

According to the team, the incorporation of carbon dioxide and steam strengthens the resulting concrete when compared to typical 3D-printed concrete, in addition to reducing the carbon footprint of the constructed material. The carbon-injected concrete was able to bear 36.8% more weight and was 45.3% more flexible compared to standard 3D-printed concrete. The scientists published their findings in the journal Carbon Capture Science & Technology.

As for carbon sequestration, this concrete could capture and store 38% more carbon compared to typical 3D-printed concrete, according to the scientists.

Not only was the resulting concrete stronger and better at storing carbon, but it was also easier to print. The study showed this concrete to have 50% more printability, or printing efficiency.

According to the World Economic Forum, cement manufacturing alone makes up about 8% of global carbon emissions. Emissions from the cement manufacturing industry totaled around 1.6 billion metric tonnes in 2022, and that number is expected to grow to 3.8 billion metric tonnes per year based on a business-as-usual scenario.

Using 3D printing can help lower emissions by reducing cement usage and waste, but innovations on the materials used in 3D printing are further reducing emissions in the construction industry. Engineers at Massachusetts Institute of Technology (MIT) have developed a way to use recycled glass in 3D printing, and scientists at University of Virginia School of Engineering and Applied Science are exploring ways of incorporating plant-based cellulose nanofibrils into 3D-printed concrete. 

The study led by NTU further advances the growing research toward more sustainable building materials that will reduce construction-related emissions.

“Our proposed system shows how capturing carbon dioxide and using it in 3D concrete printing could lead to stronger, more eco-friendly buildings, advancing construction technology,” said Daniel Tay, co-author of the study and a research fellow at NTU’s School of Mechanical and Aerospace Engineering.

The scientists at NTU and their collaborators have filed an application for a U.S. patent for their method.

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‘Forever Chemical’ TFA Detected in Mineral Water Brands in Europe

A new report from Pesticide Action Network (PAN) Europe revealed the presence of trifluoroacetic acid (TFA), a type of per- and polyfluoroalkyl substances (PFAS), in mineral water products sourced from around Europe.

Researchers tested 19 mineral water samples in total, including two mineral water brands from France, four Belgian brands, one brand from the Netherlands, one brand from Luxembourg, one from Hungary, and five Austrian brands. Analysis for the remaining five mineral and spring water brands from Germany were provided by Bund für Umwelt und Naturschutz Deutschland (BUND) for the report.

According to the report, the TFA levels exceeded the limit for pesticide metabolites for drinking water, which is set at 100 nanograms per liter, in seven out of 19 tested mineral water samples. In one sample, the amount of PFAS exceeded the upper limit of PFAS, which is 500 nanograms per liter, as proposed in the EU Drinking Water Directive. The directive is set to take effect in 2026.

This graph displays in alphabetical order the 10 mineral waters with quantifiable TFA residues, as well as the 7 mineral waters and 2 spring waters with no quantifiable TFA contamination. The blue bars represent the summer analysis results, while the light blue bars reflect the confirmatory analyses carried in autumn. Pesticide Action Network Europe

The Villers mineral water sample had the highest PFAS levels, reaching 3,200 nanograms per liter in summer testing and 3,400 nanograms per liter in fall testing. Other samples with PFAS present included Ordal, an anonymous Luxembourg brand, Vittel, Gasteiner, Waldquelle, Spreequelle, Gerolsteiner, SPA (Spadel Group) and Hassia.

However, all mineral waters were found to comply with existing PFAS limits set by multiple EU authorities. PAN Europe said that the PFAS contamination was not the fault of the mineral water companies, which may have no way to prevent or remove TFA contamination.

The findings, which follow PAN Europe’s earlier report of PFAS in tap water, have shown that PFAS contamination goes deeper than expected, reaching even farther into the ground past surface water and groundwater to reach mineral water aquifers.

“This has gone completely under the radar and it’s concerning because we’re drinking TFA,” said Angeliki Lysimachou, a co-author of the report with PAN Europe, as reported by The Guardian. “It’s much more widespread than we thought.”

According to a recent study published in Environmental Science & Technology, TFA concentrations in the environment are higher than other PFAS, because TFA is a transformation product for many PFAS. TFA is also common in refrigerants and pesticides.

The results of the TFA levels in mineral water come just as the EU Commission prepared to propose a ban on flufenacet and flutolanil, two pesticide substances that are the primary source of TFA contamination in tap water and groundwater.

“The ban of these two PFAS pesticides proposed by the EU Commission is legally required,” Salomé Roynel, policy officer at PAN Europe, said in a statement. “It is a crucial step towards reducing TFA emissions. There is no place for reprotoxic residues in our water and food. We call on Member States to follow the law and the science. We ask them to prioritise protection of human health and the environment, and swiftly adopt these bans.”

In the U.S., the Environmental Protection Agency (EPA) has excluded TFA from PFAS classification for Agency action. As The Guardian reported, TFA was found in rainwater and air samples in Michigan. In 2020, a Consumer Reports study found PFAS at a rate of more than 1 part per trillion in two major mineral water brands in the U.S.: Topo Chico, which is owned by The Coca-Cola Company, and San Pellegrino, a brand under Sanpellegrino S.p.A, which is owned by Nestlé.

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Higher PFAS Levels in Blood Linked to Neighborhood Factors

In a new study, researchers at University of Southern California (USC) have associated certain neighborhood factors — such as food access or proximity to Superfund sites — with higher levels of per- and polyfluoroalkyl substances (PFAS) in human blood.

The researchers examined the levels of certain types of PFAS, including PFOS, PFOA, PFHxS, PFPeS and PFHpS based on a neighborhood’s tap water, level of access to fresh foods and proximity to industrial polluting sites and Superfund sites. As explained by the U.S. Environmental Protection Agency, a Superfund site is an area designated as a hazardous waste dumping ground, such as landfills, mining sites and some types of manufacturing facilities.

The study drew from two previous Southern California-based studies’ data to observe how the defined neighborhood factors affected the PFAS levels in the blood of 446 people, mostly based in Los Angeles County, LAist reported.

The results revealed that each factor on its own was associated with elevated levels of certain types of PFAS in the blood. The team published the results in the journal Environmental Research.

“Instead of placing the burden on individuals to avoid PFAS, we’re looking at neighborhood factors beyond their control,” Shiwen (Sherlock) Li, Ph.D., lead author of the study and postdoctoral researcher at USC’s Keck School of Medicine, said in a statement. “How can we improve our neighborhood environments to reduce PFAS and the associated disease risk?”

The results revealed that places with PFOA, PFOA or PFHxS in the tap water also had residents with higher levels of these compounds in their blood compared to people without these compounds detected in the tap water. The areas with PFAS in the water revealed an increase of around 1.54 nanograms per milliliter (ng/mL) of PFOS, 0.47 ng/mL for PFOA and 116 ng/ML for PFHxS.

The study noted that the March Air Reserve Base in Moreno Valley, California is a known source of PFAS contamination, pictured on Sept. 21, 2004. Glenn Koenig / Los Angeles Times via Getty Images

The study also reviewed low access to fresh food as a potential link to higher PFAS in blood, because PFAS have been found in food packaging. This neighborhood factor was linked to higher levels of PFOS (an increase of 2.52 ng/mL), PFOA (0.6 ng/mL increase) and PFHpS (0.06 ng/mL) in human blood, with increases by around 40% to 60% and even over 100% for certain PFAS, as LAist reported.

The results found elevated levels of PFOS for people living within a 3-mile radius of an industrial site known for processing PFAS, and it showed higher levels of PFOS, PFHxS, PFHpS and PFPeS for people living within 3 miles of a Superfund site. In August 2024, a separate study revealed that landfills have become major sources of airborne PFAS pollution, although exact measurements of the amounts of PFAS pollution from landfills are still uncertain.

As the Keck School of Medicine reported, the residents in the study were primarily Latino, which highlighted the need for environmental justice efforts to address PFAS in underserved communities.

“We’re adding a different perspective to solving the PFAS problem, because the risk to exposure of PFAS at the neighborhood level is not evenly distributed,” Li said.

Currently, the Keck School of Medicine’s Department of Population and Public Health Sciences has ramped up efforts to educate communities about PFAS contamination in water, although Li emphasized the importance of systemic changes to reduce PFAS pollution.

“In my opinion, it’s harder to change individual behaviors, but if you can create clean environments for everyone, they don’t need any behavioral change in the first place,” Li explained, as reported by LAist.

The EPA is making efforts to regulate PFAS, two of which (PFOA and PFOS) were added to the list of hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

In April 2024, EPA finalized regulations for six types of PFAS in drinking water, and these rules are set to take effect in 2029.

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U.S. Residential Energy Storage Installations Reach a Record High

According to the latest U.S. Energy Storage Monitor report by American Clean Power Association (ACP) and Wood Mackenzie, installations of both grid-scale and residential energy storage in the U.S. are continuing to rise, even reaching record highs in the third quarter of 2024.

Grid-scale energy storage reached a record for third-quarter installations, hitting 3,806 MW installed and 9,931 MWh deployed for Q3 2024. According to ACP and Wood Mackenzie, these numbers are 80% and 58% higher, respectively, compared to just one year prior. 

The residential market in particular has seen rapid expansion, reaching an all-time quarterly record 346 MW of installed residential energy storage in Q3 2024. This represents a 63% increase just from Q2 2024.

“The rapid energy storage deployment we’re seeing in the United States not only enhances reliability and affordability but also drives economic expansion,” Noah Roberts, vice president of energy storage for ACP, said in a statement. “This additional storage capacity is helping meet increasing energy demand and is supporting growing industries like manufacturing and data centers. Energy storage is crucial for energy security and to help outpace rising demand.”

Texas and California led the way for grid-scale energy storage installations for Q3, with Texas tripling its installations compared to Q2.

On-site solar + storage for tenants at 2410 Waugh Apartments in the Montrose neighborhood of Houston, Texas. Pearlx Infrastructure

Three states are driving growth of residential energy storage: California, Arizona and North Carolina, with 56%, 73% and 100% increases in residential storage for Q3 of this year compared to one quarter prior. 

Wood Mackenzie analysts predicted a 30% growth in energy storage installations for 2024, but growth rate could slow to around 10% from 2025 to 2028. According to ACP and Wood Mackenzie, grid-scale installations are expected to increase by more than double, to 63.7 GW, by 2028, and residential energy storage is predicted to reach a total 10 GW by 2028. 

While storage expansion could remain steady, experts are concerned whether the next administration under president-elect Donald Trump will disrupt progress with changes to current tax credits or increases in tariffs.

Currently, experts at International Energy Agency (IEA) predicted falling battery storage costs by up to 40% by 2030, Reuters reported. This could increase resilience and reliability of clean energy sources, in addition to making clean energy and storage costs cheaper than fossil fuel sources.

“We are seeing the energy storage industry fill a real need across the country to provide reliability in an affordable and efficient manner for communities,” John Hensley, SVP of Markets and Policy Analysis at ACP, said in a statement. “With 64 GW of new energy storage expected in the next four years, the market signal continues to be clear that energy storage is a critical component of the grid moving forward.”

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Today’s EV Batteries May Last Up to 40% Longer Than Expected, Study Finds

A new study has revealed that modern batteries in electric vehicles may last up to 40% longer than expected thanks to stop-and-go driving patterns that help recharge batteries on the go.

According to researchers, the common lab testing methods to determine battery life may not be the most accurate way to estimate how long EV batteries will last. In lab testing, batteries are often discharged at an ongoing rate, then recharged all at once. 

But as the researchers pointed out, EV drivers experience different discharge rates in long spans of driving or stop-and-go traffic. These more frequent cycles of discharging the battery and recharging during braking could help preserve battery life.

Researchers tested 92 commercial lithium-ion batteries for a 24-month period, using both the constant discharge method as well as real-driving scenarios. The batteries tested under real driving methods had a better life expectancy, with about 38% improvement, compared to those tested under common lab testing scenarios. The team published the findings in the journal Nature Energy.

“To our surprise, real driving with frequent acceleration, braking that charges the batteries a bit, stopping to pop into a store, and letting the batteries rest for hours at a time, helps batteries last longer than we had thought based on industry standard lab tests,” Simona Onori, senior author of the study and an associate professor of energy science and engineering at Stanford University’s Doerr School of Sustainability, said in a statement.

From left to right: Simona Onori, Devi Ganapathi, Alexis Geslin, Le Xu, and Will Chueh, pose for a research team photo in the electrochemistry lab at SLAC National Accelerator Laboratory on Nov. 8, 2024. Jim Gensheimer / SLAC National Accelerator Laboratory

According to the National Renewable Energy Laboratory, EV batteries are estimated to last for around 12 to 15 years in mild climates or around 8 to 12 years in extreme climates. But the real battery degradation of EVs is still difficult to determine, since many EVs that are currently on the road were bought within the last few years, Recurrent Auto reported, with many EV batteries lasting well beyond the common 8-year, 100,000 mile warranty.

Although Electrek reported that battery prices just fell by the biggest rate since 2017, with a 20% drop in battery prices for 2024, the prices can still be of concern to consumers considering the switch to an EV over a gas-fueled vehicle. As the study authors pointed out, EV batteries still make up about one-third of the cost of a new electric car. Further, according to NerdWallet, replacing an out-of-warranty electric car battery can cost between $5,000 to $20,000

But with an increased longevity for EV batteries, swapping to an EV could be a more economical choice for consumers when compared to paying for more frequent battery replacements, plus fuel, in gas-powered vehicles. As NerdWallet reported, traditional vehicle batteries cost around $60 to $300 each, with replacements necessary every 3 to 5 years, according to AAA.

As Electrek reported, electric batteries are predicted to fall even lower in the coming years, reaching around $69 per kWh by 2030.

The findings could also improve consumer confidence in secondhand EVs, considering a Green Finance Institute survey found that 62% of respondents who didn’t already own an EV said they wouldn’t buy a used electric car due to concerns over battery health.

Although the researchers noted that dynamic cycling can extend the lifespan of an EV battery compared to constant cycling, they explained that time-induced aging will still affect batteries. Proper battery charging practices and vehicle maintenance will still be important for users to consider when maximizing the lifespan of their EV batteries.

“We battery engineers have assumed that cycle aging is much more important than time-induced aging. That’s mostly true for commercial EVs like buses and delivery vans that are almost always either in use or being recharged,” said Alexis Geslin, a lead author of the study and a Ph.D. student in materials science and engineering as well as in computer science at Stanford University’s School of Engineering. “For consumers using their EVs to get to work, pick up their kids, go to the grocery store, but mostly not using them or even charging them, time becomes the predominant cause of aging over cycling.”

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New Microplastics Water Filter Made With Cotton and Squid Bone Could Be 99.9% Effective, Scientists Report

In a new study led by researchers at Wuhan University, scientists have developed a filter, made with cotton and squid bone, that can be used to adsorb certain microplastics in aquatic environments. Further, they determined the filter was about 98% to 99.9% effective in filtering microplastics.

The study, published in the journal Science Advances, explored the development of a foam filter made with cellulose, from cotton plants, and chitin, a type of natural biopolymer found in the exoskeletons of arthropods and mollusks, as well as in some cell walls of fungi and algae, according to Science Direct. Both cellulose and chitin are considered “two of the most abundant polysaccharides found in nature,” according to the study, and they are already used frequently for removing larger pollutants from wastewater.

The researchers are applying the use of cellulose and chitin in a novel way to tackle microplastic pollution in water, which has typically been addressed with magnets, surface-engineered adsorption methods or coagulation methods, all of which can be difficult and expensive to scale.

However, the researchers noted that using cellulose and chitin, which for this study they sourced from cotton and squid bone, respectively, would result in a cost-effective and scalable foam known as Ct-Cel that could effectively filter out microplastics such as polystyrene, polymethyl methacrylate, polypropylene and polyethylene terephthalate, according to the study. The foam can also be produced in a readily available way using freeze dryers or mechanical stirrers, The Guardian reported.

As Phys.org reported, the resulting filter was effective on several different types of plastics, including 100-nanometer polystyrene particles to microplastics spanning about 3 microns in size.

In addition to the impressive 98% to 99.9% adsorption rate, the scientists were also surprised by the reusability of the filters. After going through five filtration cycles, the filters were still effectively adsorbing microplastics in irrigation waters, lake water, still water and coastal waters at a rate of 95.1% to 98.1%.

“The favorable recycling ability of biomass foams in organic solvents can further reduce the cost of feedstock and disposal of waste biomass, thereby enhancing their potential for dealing with microplastic contamination on a large scale,” the authors wrote in the study. “Moreover, the recycling process could prevent microplastics from re-entering the environment during the natural degradation of biomass foam.”

According to The Guardian, an industrial-scale model of the Ct-Cel filter could be ready within several years. After testing that model, the filter could be designed and scaled for filtering microplastics for residential and municipal water systems.

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EPA Bans Two Chemicals Common in Dry Cleaning and Industrial Use

The U.S. Environmental Protection Agency (EPA) has banned two chemicals commonly used in dry cleaning because of their toxicity and cancer risks. 

The EPA announced on Dec. 9 that it finalized the risk management regulations for trichloroethylene (TCE) and perchloroethylene (PCE) under the Toxic Substances Control Act (TSCA).

PCE is commonly used for dry cleaning clothing, and TCE was once used for dry cleaning but has been phased out for that use, according to a 2016 study. Still, both substances are also used in industrial degreasers, consumer adhesive products and paint and stain removing products, the Minnesota Department of Health reported. 

According to the EPA, both chemicals are volatile organic compounds and exposure to each comes with its own elevated risks of certain forms of cancer. 

“It’s simply unacceptable to continue to allow cancer-causing chemicals to be used for things like glue, dry cleaning or stain removers when safer alternatives exist,” Michal Freedhoff, assistant administrator for the Office of Chemical Safety and Pollution Prevention, said in a statement. “These rules are grounded in the best-available science that demonstrates the harmful impacts of PCE and TCE.”

TCE is considered extremely toxic, even in small concentrations, and has been linked to liver cancer, kidney cancer, non-Hodgkin’s lymphoma, fetal heart defects and damage to the central nervous system, kidneys, liver, immune system and reproductive organs, the EPA reported.

Most uses of TCE will be fully banned within the next year, while it will be phased out over a longer timeframe in select industrial uses that will still limit the amount during the phase-out period. The new ban also establishes an inhalation exposure limit that the EPA said would reduce long-term exposure for workers by about 97%.

PCE has been linked to liver cancer, brain cancer, kidney cancer and testicular cancer, along with kidney, liver and immune system damage. It has also been known to cause neurotoxicity and reproductive toxicity, according to the EPA.

The use of PCE in dry cleaning will now be phased out over a 10-year period, except for in new dry-cleaning machines, which will have to stop using PCE within six months. In other industrial and commercial uses, PCE is expected to be phased out within three years, as the EPA determined safer alternatives that are comparably effective to PCE are already available. The finalized PCE rules will be explained in an EPA announcement scheduled for January 15, 2025.

For workplaces that will continue using TCE and/or PCE in limited amounts or during a phase-out timeline, the EPA established a Workplace Chemical Protection Program, which companies have 30 months to implement.

“Despite their dangers, these chemicals could still be found in industries like dry cleaning, automotive repair and manufacturing,” Sen. Ed Markey (Mass.) said in a statement. “With no doubt that these chemicals are deadly, there is no doubt that this final rule will save lives — especially our children’s lives — around the country.”

For small businesses, the Biden administration has proposed funding to assist with the chemical phase-outs and TSCA compliance.

As Chemical and Engineering News reported, the EPA initially announced plans to phase-out PCE in 2023 after identifying related health risks to workers and consumers exposed to the chemical in 2020.

But at the state level, some states have established limits and bans to PCE use several years earlier. California initiated a phase-out of PCE in dry cleaning uses in 2007, with the full phase-out finalized by January 1, 2023, Chemical and Engineering News reported. 

As reported by The Council of State Governments Midwestern Office, Minnesota banned PCE use in 2021, with the full phase-out to be completed by January 1, 2026. The Minnesota legislation also includes funding to help dry cleaning businesses with the transition to alternatives as well as to financially support soil and groundwater cleanup of PCE contamination.

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