Tuesday, April 01, 2025

 

Profit-driven policies on waste are fuelling global inequality, says professor





Taylor & Francis Group





Policies around waste management and processing are making global inequalities worse, according to an environmental professor.

Waste: The Basics also says that consumers are being held ‘disproportionately’ responsible for the garbage crisis when industry produces more waste – and it’s often highly toxic.

Author Myra J Hird likens this tactic of blaming the public to campaigns by tobacco companies to draw attention away from the health and environmental risks of smoking.

Instead of blaming the public, Professor Hird’s book calls out policies that prioritise a profit-driven approach to recycling. She also argues not only for more responsible consumption, but also for responsible production by manufacturers.

The academic, from Queen's University, Canada, says: “The global waste crisis will not be resolved until we turn off the waste-generating ‘tap’. And to do this, we need to consider what motivates producers to create products with known and unknown contaminants. 

“We need to think about what regulatory and policy incentives and penalties to adopt to hold industry responsible for the products they produce. And the marketing that encourages, incites, shames, flatters and otherwise increases consumption of their products. 

“We need national and international regulations that require producers to build product waste and contamination into their product production projections. All these amount to one overarching goal – to get producers to take responsibility for the waste that manufacturing, distribution and retail produces.”

Waste: The Basics is a call to action for policymakers to engage with waste as a social justice issue. Based on social and environmental science, it provides evidence that attitudes towards waste in the US and other countries are causing harm to lower-income nations and communities.

People of color are more likely to live closer to toxic waste sites and polluted areas in what is termed environmental racism. This is also the case with indigenous and income-insecure communities which has a major impact on health.

An example highlighted by the book is Louisiana, in the US, where a stretch of land along the Mississippi has been nicknamed ‘cancer alley’ because more than 200 petrochemical plants are sited there. Other examples given are ‘sacrifice zones’ where residents live immediately adjacent to heavily polluted industries.

Waste is increasing despite efforts by some governments and sections of industry. Other nations have backtracked on policies to protect the environment. Last month, President Trump signed an executive order backing the plastic production and fossil fuel sectors.

Waste: The Basics shows how a minority of people are significantly over-consuming. High-income countries account for 16% of the world’s population but generate a third (34%) of the planet’s garbage.

Private waste management firms are also encouraging households to dispose more to boost profits, according to the author. Professor Hird says single or short-use products and marketing campaigns that encourage consumption are to blame for throw-away societies.

Other issues which add to social injustice include waste export from wealthy to poor regions; the hazards and job insecurity faced by waste pickers; and waste ‘landscapes’ such as contaminated land.

Professor Hird outlines reasons why lower income communities are more likely to suffer the consequences of waste and pollution. They are less able to afford lawyers, to have time to protest against incinerators, and more likely to agree to a waste plant locally in return for financial compensation.

The author says the world waste crisis is a complex problem and individual action alone cannot solve the issue. Countries, associations and institutions must work together to establish processes that best protect the environment and prioritise waste reduction, adds Professor Hird.

She concludes: “We need to take action to reduce consumption whenever we can, try to consume differently within our means. We must join forces with others to advocate for a less contaminated and more socially just planetary system.”

 

ECNU Review of Education study proposes spatiotemporal framework for educational transformation



A new study offers fresh perspective on how education systems can adapt to the challenges and opportunities of artificial intelligence (AI)




ECNU Review of Education

: A spatiotemporal perspective on enhancing student autonomy in the education system 

image: 

In the current age of AI, students’ time available for autonomy is limited due to prescribed curriculum, which occupies all students’ time in school. It is only by introducing effective changes in prescribed curriculum, pedagogy, activities, learning environments, and assessments that student autonomy and learning can be improved upon globally.

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Credit: US Department of Education on Flickr Image Source Link: https://openverse.org/image/186f2db4-68aa-4353-bdce-455bd8d1d946




In an age dominated by the rise of technology and AI, the current education system is beset by several challenges, including the lack of student autonomy and an extremely rigid and time-consuming schooling system. The more students are compelled to follow a prescribed curriculum, the less freedom they have to personalize their learning. Improvements in schooling have thus become a major area of interest as policymakers, practitioners, and researchers have been working hard to tweak, enhance, and optimize the mechanisms of the current education system.

In response to these challenges, a new study by Yong Zhao from the University of Kansas and Ruojun Zhong from YEE Education provides a detailed framework for transforming education by rethinking the traditional constraints of time and space in learning. This study was made available online on February 11, 2025, in ECNU Review of Education.

According to the researchers, the current schooling and education system suffers from rigidity in curriculum and four other key elements within the school-based system, namely pedagogy, evaluation and assessment, activities, and environment. Through their analysis, the authors hoped to identify concrete strategies to balance the prescribed curriculum with learners’ control over learning. The study also provides a detailed analysis of the schooling system from spatiotemporal perspectives along with a uniquely fresh perspective on the changes and improvements required to weather the challenges of AI and enhance student learning.

The study introduces the concept of “Time Available for Autonomy” (TAFA) as a key indicator of student control over their learning experiences. It highlights how prescribed curricula, pedagogical practices, learning activities, environments, and assessments often restrict students’ ability to explore, create, and develop their unique interests and strengths. The authors advocate for a more flexible and student-centered approach that allows learners to take charge of their educational journeys.

Zhong and Zhao note, “The current education system, with its emphasis on standardized curricula and assessments, leaves little room for students to pursue their passions and develop essential skills like creativity and critical thinking. By adopting a spatiotemporal lens, we can identify new ways to expand students’ autonomy and prepare them for the uncertainties of the AI-driven future.

The study proposes several innovative strategies for transforming education, including reducing scheduled time by limiting the amount of time dedicated to prescribed curricula, thereby creating more opportunities for students to engage in self-directed learning and pursue their interests. It also calls for transforming pedagogy by shifting the role of teachers from mere content deliverers to facilitators and mentors who support student-driven projects and inquiry-based learning.

Additionally, the study suggests rethinking learning environments through the use of AI and other technologies to create global, borderless learning spaces that extend beyond the physical classroom and empower students to learn from diverse perspectives. The article stresses that schools and teachers must reassess how AI and other technologies fit into students’ learning experiences. Despite significant investments in modernizing classrooms with technology, there has been limited improvement in educational outcomes. This stagnation may stem from an outdated view of teaching and learning that fails to harness technology’s full potential.

Finally, it advocates for personalizing assessments by moving away from standardized tests to more holistic and personalized evaluation methods that capture individual growth, strengths, and potential. Zhong and Zhao emphasize that these changes must be implemented systemically, recognizing the interconnectedness of various educational elements. They argue that by extending students’ TAFA, education systems can foster greater creativity, resilience, and adaptability—qualities essential for thriving in the age of AI.

In conclusion, the study calls for a collective effort from policymakers, educators, and stakeholders to embrace a new paradigm of education that prioritizes student autonomy and personalization. "The future of education lies in our ability to adapt and innovate," say Zhong and Zhao. Adding further, they claim, By rethinking the traditional constraints of time and space, we can create learning experiences that empower every student to reach their full potential.

 

***

Reference                                

Title of original paper: Education Paradigm Shifts in the Age of AI: A Spatiotemporal Analysis of Learning

DOI: 10.1177/20965311251315204

Journal: ECNU Review of Education

 

 

Diagnosing a dud may lead to a better battery




Virginia Tech





It’s (going to be) electric.

But how soon? How quickly our society can maximize the benefit of electrification hinges on finding cheaper, higher performance batteries — a reality closer to hand through new research from Virginia Tech.

A team of chemists led by Feng Lin and Louis Madsen found a way to see into battery interfaces, which are tight, tricky spots buried deep inside the cell. The research findings were published on April 1 in the journal Nature Nanotechnology.

“There are major, longstanding challenges at the interfaces,” said Jungki Min, a chemistry graduate student and the study’s first author. “We are always trying to gain better control over these buried surfaces.”

The team member’s discovery of a new imaging technique that enabled them to peer inside an operating battery happened by chance. They were originally looking at a new formulation of electrolyte material. 

The best battery batter

Sandwiched between the negative and positive electrodes, the electrolyte is the filling that carries charged particles, called ions, back and forth to charge and discharge a battery.

Electrolytes have many possible component combinations involving salts, solvents, and additives. They can be liquid, solid, gel-like, or even multiphase, which means that the material can shift from rigid to flexible depending on the conditions.

But what’s the best material to use for the critical task of ferrying charge?

That’s one of the big questions in science right now, and it is key to developing high-energy batteries with longer lifespans that can be stable at extreme temperatures — all important qualities for the next generation of electric vehicles, electric appliances, and other battery-powered technologies such as artificial intelligence.

Where energy goes to disappear

To answer this question, Lin and Madsen have been looking at something called a multiphase polymer electrolyte, which has the potential to store more energy in the same size battery, along with being safer and cheaper than conventional batteries.

Madsen’s lab discovered a multiphase electrolyte, called a molecular ionic composite, in 2015. Madsen’s and Lin’s research groups have been working together to build lithium and sodium batteries based on this formulation, and they have been making consistent improvements.

But there are a few caveats: The batteries are plagued with weird growths and unhelpful behaviors that sprout up where the electrolyte and the electrodes come together at that Bermuda Triangle of batteries, the interfaces.

Insight at the interfaces

To catch a glimpse of what was causing the spazzy interface behavior, Min took many trips to Brookhaven National Laboratory over the past few years.

Brookhaven’s tender energy X-ray beam line is heavily used to analyze things such as meteorites and fungi. But no one had ever used it to look at polymer electrolytes.

What researchers found, combined with results from other imaging techniques, allowed then to pinpoint the source of the problems: Part of the architectural support system degraded as the battery cycled, leading to eventual failure.

But it’s more than just a simple diagnosis.

From here on out, researchers can use this technique to finally see both the intricate structure and the chemical reactions of the buried interfaces.

“This has been a great collaboration between multiple research laboratories across the country,” said Lin, who is a Leo and Melva Harris Faculty Fellow. “We now have a good mechanistic picture to guide us for a better design of interfaces and interphases in solid polymer batteries.”

Study collaborators include:

Researchers from Boise State University, University of Pennsylvania, and Brookhaven National Laboratory.

The work was primarily supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy. Part of the work was also supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy through the Advanced Battery Materials Research Program (Battery500 Consortium). Seedling support was provided through the Virginia Tech College of Science Strategic Initiative in Energy with resources from the Virginia Tech Nanoscale Characterization and Fabrication Laboratory.

Original Study DOI: 10.1038/s41565-025-01885-5

 

Break the sedentary cycle: National Walking Day can kickstart healthier routines



The American Heart Association encourages people to move more for a healthier mind and body on National Walking Day, Wednesday, April 2



American Heart Association




DALLAS, April 1, 2025 — Sedentary behavior has become a national health crisis, with 1 in 4 U.S. adults sitting for more than eight hours a day, increasing their risk for heart disease, stroke, and mental health challenges, according to the Centers for Disease Control and Prevention. To help people move more, the American Heart Association, a global force changing the future of health of all, invites communities nationwide to walk together on Wednesday, April 2.

Adopting healthier routines doesn’t have to be intimidating or overwhelming according to Eduardo Sanchez MD, MPH, FAHA, the Association’s chief medical officer for prevention. Routine walks can be a simple yet powerful way to break the cycle of sedentary behavior.

"Walking is one of the easiest and most accessible ways to improve both physical and mental well-being," said Sanchez. "Even small steps can lead to big changes. By making movement a part of your day — whether that’s walking your dog, picking parking spot a little further away from the entrance, or strolling with family — you’re investing in your heart health and improving your overall wellness.”

To make the most of National Walking Day, consider these tips:

  • Invite friends, family or colleagues to join you for a walk.
  • Take a conference call on the move if you work remotely.
  • Bring your pet along—it’s great for both of you!
  • Share your walk on social media using #NationalWalkingDay to inspire others.
  • Take a family stroll after dinner to wind down for the evening.

If walking isn't accessible for you, consider seated exercises or gentle stretching to stay active.

Regular physical activity, such as walking, is one of the most effective ways to improve overall health and is also a key component of the American Heart Association’s Life’s Essential 8™, a collection of the most critical factors for achieving optimal cardiovascular health.

The Association recommends at least 150 minutes per week of moderate-intensity aerobic activity, such as brisk walking or gardening, or 75 minutes of vigorous-intensity aerobic activity, such as running or aerobic dancing. Additionally, two days of moderate- to high-intensity muscle-strengthening activities, such as resistance training, are recommended weekly.

For practical tips and inspiration to build healthier habits, visit the Association’s Healthy for Good™ initiative at heart.org/movemore

Additional Resources:

 

Surprising number of environmental pollutants in hedgehogs



Lund University






Lead, pesticides, brominated flame retardants, plastic additives, polychlorinated biphenyls (PCBs),  and heavy metals. This is what researchers at Lund University in Sweden found when they collected dead hedgehogs to investigate the environmental pollutants found in urban environments. 

Previous research has investigated the presence of heavy metals in hedgehogs from other urban areas in Europe and found similarly elevated levels of heavy metals. However, the team weren’t expecting so many other pollutants.

“What surprised us was that there were so many different environmental pollutants in the animals, such as PCBs and several different phthalates, and that there were very high concentrations of certain heavy metals, especially lead,” says Maria Hansson, ecotoxicologist at Lund University and the person who initiated the study.

The Lund researchers are, to their knowledge, the first to find evidence of hedgehog exposure to PAHs, phthalates and pesticides through analyses of liver tissue.

Environmental fingerprint

Urban green spaces attract many species of wildlife but also contain a range of unsustainable synthetic materials and chemicals. Because hedgehogs travel long distances – in and out of parks and gardens every night – and eat insects and other invertebrates, they are particularly exposed to high concentrations of environmental pollutants. When researchers in Lund wanted to learn more about the chemicals and pollutants found in urban areas, using the hedgehog as a study subject was therefore a natural choice. The objective was to understand what risk factors the different pollutants pose to animals in urban environments, and also to ourselves.

“Analysing hedgehogs provides us with a kind of environmental fingerprint of what is in an area’s ecosystem. Such knowledge is very difficult to access, but the hedgehogs have enabled us to gain a unique insight into what kind of urban environmental pollution we have directly around us,” explains Maria Hansson.

Roadkill hedgehogs were examined

As part of the project, which was based in Lund and neighbouring areas in Skåne, Sweden, Maria Hansson and her colleagues enlisted the help of the public, who were asked to get in touch if they came across a dead hedgehog. The researchers were also given access to hedgehogs that had been submitted for wildlife rehabilitation but had died. In total, they measured the presence of 11 different elements, including several heavy metals, and 48 organic environmental pollutants in the dead hedgehogs.

The researchers wanted to do a more in-depth analysis than had been previously conducted. Therefore, they looked at both long-term exposure to heavy metals (by examining both spines and teeth) as well as more short-term exposure to a variety of organic environmental chemicals (by examining liver tissue). 

The results showed that the hedgehogs had high concentrations of the heavy metal lead and contained several organic environmental chemicals such as phthalates used as plasticisers in plastics and rubber, as well as PCBs – a collective name for toxic substances that have been banned in manufacturing since the 1970s. In addition, the researchers found pesticides, brominated flame retardants, elevated levels of other heavy metals and polycyclic aromatic hydrocarbons (PAHs) in some animals.

More environmental monitoring needed in urban environments

“This shows that urban environments, where the majority of people live today, contain a large amount of environmentally problematic substances that are proven to be harmful to health. These problematic substances come from building materials, plastics, pesticides, air pollution, waste, traffic, vehicles and even contaminated soil,” says Maria Hansson.

She says the study highlights the need for more environmental monitoring of soil and organisms in urban areas, including gardens and parks. 

“People should also reduce the use of synthetic materials, chemicals and plastics as they have an impact on nature. Today, we want nature in our cities, so we must also reduce the risk of organisms being exposed to the chemicals in the materials and products we choose to use,” she says.

Indistinct impact

The hedgehog is a red-listed species and Maria Hansson emphasises the importance of using tissue from animal carcasses as far as possible in studies like this.

“Deliberately killing wild animals is unethical and should obviously be avoided,” she says.

How hedgehogs are affected by the substances and environmental pollutants to which they are exposed is not yet known by the researchers. Very little is known about how different species are affected by environmentally hazardous substances and studying wildlife is considered complex. 

 “However, as hedgehogs are mammals just like us, it is worrying to find substances that we know are endocrine disruptors, carcinogenic or interfere with human reproduction. Of course, other organisms are also affected by our emissions,” concludes Maria Hansson.