Sunday, June 04, 2023

Nuclear Turns Fashionable

  COUNTERPOINT  MAY 26, 2023
 MAY 26, 2023

Screen grab from Westinghouse promotional video.

Small Modular Reactors (SMR) are the new nuclear craze, especially with the U.S. Congress, as America’s representatives see SMRs as a big answer to energy needs and reduction of greenhouse gases, advertised as a green deal for clean energy that skirts the heavy costs of paying the Middle East billions upon billions. However, the devil in the details is dangerously overlooked.

Notable nuclear accidents: NRX (1952) Kyshtym (1957) Windscale (1957) SL-1 (1961) Wood River Junction (1964) K-27 (1968) Three Mile Island (1979) Constituyentes (1983) Mohammedia (1984) K-431 (1985) Chernobyl (1986) Tokai (1997, 1999) Fukushima (2011) … but wait, hundreds, possibly thousands, of Small Modular Reactors (nuclear SMRs) are about to pop up around the world. What could possibly go wrong?

“Multiple and unexpected failures are built into society’s complex and tightly coupled nuclear reactor systems. Such accidents are unavoidable and cannot be designed around.” (Charles Perrow, Normal Accidents (Princeton University Press, 1999)

“On dozens of occasions because of human error or technical miscue or active threat, the world has come dangerously close to the brink of nuclear conflagration… it is a terrifying history of which most people remain ignorant.” (Julian Cribb, How to Fix a Broken Planet, Cambridge University Press, 2023.)

Should nuclear power really circumnavigate the planet with mini-power plants?

For Germany, which closed its last three nuclear plants in April 2023, the country’s Federal Office for the Safety of Nuclear Waste Management conducted a study: “SMRs have been the subject of repeated discussion in recent times. They promise cheap energy, safety, and little waste. BASE commissioned an expert report (in German) to evaluate these concepts and the risks associated with them. The report provides a scientific assessment of possible areas of application and the associated safety issues. It concludes that the construction of SMRs is only economically viable for a very large number of units and poses significant risks if widely deployed.”

Yet, “resistance to nuclear power is starting to ebb around the world with support from a surprising group: environmentalists… This change of heart spans the globe, and is being prompted by climate change, unreliable electrical grids and fears about national security in the wake of Russia’s invasion of Ukraine.” (Source: Why Even Environmentalists are Supporting Nuclear Power Today, NPR, August 30, 2022

U.S. senators recently introduced a nuclear energy bill called the Advance Act with bipartisan support, hopefully enhancing and advancing America’s world leadership role in nuclear energy by deploying SMRs by the bucketful, idealized as a “cleaner smarter safer solution” to today’s bulky nuclear power plants. Advance Act will cut red tape and make it easier and much faster for SMRs to gain a foothold in the marketplace.

Meanwhile, like the U.S., China has the same red hot nuclear fever. It has set aside $440B for its nuclear program, planning to build 150 new reactors by 2037, which equates to 10 per year, which, by almost all standards, seems unachievable. It tops cumulative world production over the past three decades.

Fearful of being left in China’s nuclear dust, on May 18th, a proposed House bill by Wittman (R-VA) speeds-up the building process for SMRs. And Joe Manchin (D-WV) has proposed the Nuclear Fuel Security Act to set up a nuclear fuel security program promoting domestic production of uranium.

The excitement over nuclear is palpable, as politicians’ hands tremble with excitement, introducing what’s billed as the perfect green clean way to solve energy needs. There are cheerleaders galore. The U.S. Congress for one is a very influential cheerleading group, but it’s more pervasive than that. Big players like Japan and China are going all-in for nuclear. Japan Adopts Plan to Maximize Nuclear Energy, in Major Shift, AP News, December 22, 2022.

Wait a moment… isn’t Japan currently being criticized in several quarters of the world for dumping Fukushima toxic radioactive water into the ocean? After all, the U.S. National Association of Marine Laboratories, with over 100 member laboratories, issued a position paper strongly opposing the toxic dumping because of a lack of adequate and accurate scientific data in support of Japan’s assertions of safety.

Regardless, last week the G7 nations gave its blessing for Japan to dump Fukushima’s toxic water into the Pacific Ocean. Hmm.

Interestingly, PM Shinzo Abe (1954-2022) shortly after Fukushima’s meltdown 10 years ago, assured the International Olympic Committee in consideration of holding the games in Tokyo, that “everything was under control.” Notwithstanding numerous assurances by Japanese authorities of no harm, no foul, over the years, several independent journalists in Japan have reported numerous deaths because of the Fukushima meltdown and its aftermath but never acknowledged by the government. Assurances are not always assurances!

Therefore, it’s only fair that the darker side of nuclear cheerleading — yea yea yea no nuclear no nuclear — deserves some notoriety. For starters, the results of a recent study by Stanford University’s Center for International Security and Cooperation published in the prestigious Proceedings of the National Academy of Sciences, May 31, 2022, entitled Nuclear Waste from Small Modular Reactors.

Stanford News also published the study: Sandford-led Research Finds Small Modular Reactors Will Exacerbate Challenges of Highly Radioactive Nuclear Waste. The study concludes that SMRs will generate more radioactive waste than conventional nuclear power plants. Stanford and the University of British Columbia jointly conducted the study, e.g., SMRs will be manufactured in factories and industry analysts claim SMRs will be cheaper and produce fewer radioactive byproducts than the big bulky conventional reactors; however, the study discovered the upsetting fact that, pound-for-pound when compared to the big bulky conventional nuclear plants, SMRs will increase nuclear waste… considerably!

“Our results show that most small modular reactor designs will actually increase the volume of nuclear waste in need of management and disposal, by factors of 2 to 30 for the reactors in our case study,” said study lead author Lindsay Krall, a former MacArthur Postdoctoral Fellow at Stanford University’s Center for International Security and Cooperation: “These findings stand in sharp contrast to the cost and waste reduction benefits that advocates have claimed for advanced nuclear technologies.” (Stanford study)

U.S. nuclear plants have already produced over 88,000 metric tons of “spent nuclear fuel” with nowhere to put it other than risky open pools of water at plant locations and some dry casks setups. Throughout America nuclear facilities contain open pools of spent fuel rods. According to Paul Blanch: “Continual storage in spent fuel pools is the most unsafe thing you could do.” (Paul Blanch, registered professional engineer, US Navy Reactor Operator & Instructor with 55 years of experience with nuclear engineering and regulatory agencies, widely recognized as one of America’s leading experts on nuclear power)

Accordingly, “the most highly radioactive waste, mainly spent fuel rods, will have to be isolated in deep-mined geologic repositories for hundreds of thousands of years. At present, the U.S. has no program to develop a geologic repository, after spending decades and billions of dollars on the Yucca Mountain site in Nevada. As a result, spent nuclear fuel is currently stored in pools or in dry casks at reactor sites, accumulating at a rate of about 2,000 metric tonnes per year.” (Stanford)

Nobody wants it in their backyard. Furthermore, what’s the message behind the fact that humanity has humiliatingly endangered itself by utilizing the most potent toxic material on Earth to boil water that results in highly radioactive spent fuel rods that can only be stored in deep-deep geologic repositories as far away from civilization as possible, locked away for centuries upon centuries? Rubbing two sticks together a million years ago was much smarter.

The Stanford study claims that few, if any, developers of SMR have analyzed the management and disposal of nuclear waste. “The study concludes that, overall, small modular designs are inferior to conventional reactors with respect to radioactive waste generation, management requirements, and disposal options.”

Meanwhile, SMRs are about to enter a world of nuclear power that has sharp critics. For example, crib notes of a detailed analysis of nuclear by Greenpeace, which has considerable nuclear expertise on staff, provides an offset to the ringing applause around the world for SMRs: 6 Reasons Why Nuclear Energy is not the Way to a Green and Peaceful World d/d March 18, 2022.

Greenpeace is not at all hesitant about exposing the “myths being perpetuated by the nuclear industry.”

For starters the scale of proposed nuclear energy installations does not come close to meeting the needs to go to net zero emissions in a timely fashion, according to projections by the World Nuclear Association, greenhouse gas emissions would only drop by 4% by 2050, assuming 37 new large nuclear reactors brought onto the grid per year from now to 2050. Yet only 57 new reactors are schedule for construction over the next 15 years. A number for SMRs is unknown currently.

Nuclear power plants are extremely dangerous as easy targets for terrorists, cyberattacks or acts of war. Moreover, they are unique hazards for accidents by nature like Fukushima and/or by human error like Chernobyl, and some accidents never go away.

“For the first time in history, a major war is being waged in a country with multiple nuclear reactors and thousands of tons of highly radioactive spent fuel. The war in southern Ukraine around Zaporizhzhia puts them all at heightened risk of a severe accident…. Nuclear power plants are some of the most complex and sensitive industrial installations, which require a very complex set of resources in ready state at all times to keep them operational,” Ibid.

Nuclear power plants are a water-hungry technology that must, must, must have a lot of water to cool the radioactive hot stuff. Nuclear power facilities are vulnerable to water stress, warming rivers, and rising temperatures. Facilities in the US and France have often been shut down during heatwaves or have scaled down activity, especially France’s shakiness in 2022. Global warming is nuclear power’s biggest enemy.

And, then there’s this: “Electricite de France SA’s fleet of 56 atomic power plants has long been the backbone of Europe’s energy system, but in 2022 it was more of a millstone. As reactors were shut down to fix cracked pipes, the company’s nuclear power generation slumped to the lowest since 1988, making the region more dependent on fossil fuels just as Russia squeezed natural gas exports.” (Source: French Nuclear Revival Hits Trouble as New Reactor Defects Found, Bloomberg March 10, 2023)

Not only does nuclear power put enormous stress on structural facilities, a huge incalculable risk, but water flowing past the nuclear fuel in the reactor cores gets heated to over 500°F. It can be heated to this temperature because it is pressurized to over 1,000 pounds per square inch (psi). The reactor vessel and its attached piping must be robust to remain intact and contain this high-pressure fluid. Abnormally high pressure can break even robust containers. (Union of Concerned Scientist) The strongest known pressure relief valves and piping must endure enormous pressure 24/7/365. This is an extreme high-risk category of nuclear operations.

Nuclear energy is also too expensive. According to a World Nuclear Industry Status Report, nuclear energy per MWh (megawatt-hour) costs 3-to-5 times more than wind or solar. Moreover, according to the same source, total costs of building and running a plant to lifetime for utility scale operations over the past decade have dropped by 88% for solar and by 69% for wind whilst nuclear has increased by 23%. Duh!

“Stabilizing the climate is an emergency. Yet, Nuclear Power is slow” (Greenpeace). The World Nuclear Industry Status Report says is takes 10 years on average in the world to construct a plant.

It’s impossible to get around the issue of radioactive waste, which is a huge problem that haunts the industry. Some isotopes remain highly radioactive for several thousand years. What to do with it? The costs are outrageous. The US Energy Dept. projected cost for long-term nuclear waste cleanup jumped more than $100B in just one year. According to Stanford’s study, SMRs will exaggerate this problem by factors of 2-to-30. (Stanford study)

But, of course there’s always the easy way out of handling toxic waste: According to a Greenpeace International 2021 Tweet: “French companies are exporting nuclear waste to Siberia dumping barrels in unsafe conditions completely exposed to the elements.” Hmm.

Moreover, it’s oxymoronic to claim nuclear power is “sustainable green energy” and should be eligible for green funding. Oh, please! Only radioactive waste is sustainable. Interestingly, in 2021 Austria, Denmark, Germany, Luxembourg, and Spain objected to an inclusion of nuclear power in the EU’s green finance category.

And nuclear energy has always overpromised and underdelivered: “Hypothetical new nuclear power technologies have been promised to be the next big thing for the last forty years, but in spite of massive public subsidies, that prospect has never panned out. That is also true of Small Modular Reactors, SMRs,” Ibid.

As explained in a press release d/d November 18, 2020, regarding SMR development: “The proposed reactors are still on the drawing board and will take a decade or more to develop. If built, their power will cost ten (10) times more than wind or solar energy. The most advanced SMR project to date in the US has already doubled its estimated costs from $3B to over $6B,” Ibid.

However, Russia has already launched a floating 70MW reactor in the Arctic Ocean (of all places!). China is also working on a floating design SMR. And three provinces in Canada are looking into SMRs. Rolls-Royce in the UK is working on a 440MW SMR. SMRs are generally designed to produce 50 to 300MW of electricity compared to the typical 1,000MW of traditional large-scale reactors.

In fairness to advocates, according to Nuscale, one of the engineering firms behind SMR development: “Even under worst case scenarios, where we lose all off-site power, the reactor will safely automatically shut down and remain cool for an unlimited time.’ adding, ‘this is the first time that’s been done’ for commercial nuclear power.” (Source: The Countries Building Miniature Nuclear Reactors, Future Planet, Yale e360, March 9, 2020).

Still, every nuclear conversation turns to radioactive waste and safety regardless of claims made by industry and with good reason. In fact, the repercussions of nuclear accident deaths and disfigurements are always buried from public view, until years later when the brutal truth finally comes out.

A BBC Future Planet article d/d July 25, 2019, The True Toll of the Chernobyl Disaster: “According to the official, internationally recognized death toll, just 31 people died as an immediate result of Chernobyl while the UN estimates that only 50 deaths can be directly attributed to the disaster. In 2005, it predicted a further 4,000 might eventually die as a result of the radiation exposure… Brown’s research, however, suggests Chernobyl has cast a far longer shadow.”

According to an article in USA Today d/d February 24, 2022, What Happened at Chernobyl? What to Know About Nuclear Disaster: “At least 28 people were killed by the disaster, but thousands more have died from cancer as a result of radiation that spread after the explosion and fire. The effects of radiation on the environment and humans is still being studied.”

As of 2023, the death count is much more than the 4,000 calculation of 2005.

The legacy of nuclear accidents, as deaths and deformities mount over time, kills the dream of a carbonless, clean power future. But legacies take years to form. Given enough time, radioactive waste will greet 30th century archeologists.

For a prize-winning compelling read about the most toxic place in America and a terrifying look at the radioactive nuclear materials produced at Hanford for four decades: Atomic DaysThe Untold Story of the Most Toxic Place in America (Haymarket Books, 2022)

Regardless of the strongest assurances, nuclear accidents happen. They just happen!

Robert Hunziker lives in Los Angeles and can be reached at rlhunziker@gmail.com.

Bright orange ocean water being tested by B.C. scientists

Such blooms regularly appears in the Strait of Georgia, but it's not the most common or most harmful algae.

Scientists are taking a close look at a bright orange algae bloom found in the ocean off Vancouver Island and the Sunshine Coast. 

Svetlana Esenkulova, a biologist with Pacific Salmon Foundation, is trying to determine if the phytoplankton bloom is negatively impacting salmon. 

“Noctiluca blooms can disrupt the overall balance of marine ecosystems as they ‘steal’ food from zooplankton,” she said. 

Under a microscope, the organisms "look like giant watermelons with pigtails and they wave those pigtails," said Esenkulova, who has a sample of the orange ocean water in her kitchen. When the water is cold, she can see the organisms trying to catch food.

Such blooms regularly appears in the Strait of Georgia — this one has been seen off Vancouver Island, Salt Spring Island and the Sunshine coast — but it’s not the most common or harmful algae. It also draws a lot of attention from the public, Esenkulova said, for its bright colour. 

Sarah Merriam was at Maple Bay Marina near Duncan last Saturday when she spotted the bright orange water. 

“It was thick. You couldn’t even see the water, like under the water. It was just straight orange,” said Merriam, who recorded the phenomenon on video. 

Merriam thought it looked like red tide, an algae bloom that has toxic effects on people, fish, shellfish, marine mammals and birds. 

Esenkulova said Noctiluca blooms do not produce biotoxins and do not cause shellfish poisoning. But that doesn't mean they don't have an impact.

Ocean ecosystem could be impacted by orange bloom 

Every year, the Pacific Salmon Foundation provides a summary of its annual observations on oceanography and harmful algae to Fisheries and Oceans Canada. The foundation aims to restore wild Pacific salmon populations and their habitats in British Columbia and the Yukon. 

So far, it’s too early to say if the salmon are being impacted by this particular bloom, Esenkulova said. 

“We’re not there yet. Right now, we have a lot of data. It takes years to determine this level of impact.” 

However, there are short-term impacts that are known, she said. 

“It could potentially have a very big impact on the ecosystem,” Esenkulova said. “Once this bloom dies off, there is a decomposition process happening and the dissolved oxygen level in the water drops down and causes hypoxia,” or low oxygen levels. 

The Pacific Salmon Foundation will continue to study the algae. The organization relies on the public to alert them to the blooms. 

If you see anything unusual in the water, you’re asked to take a photo, note the time and location and collect a water sample. Esenkulova can be reached at sesenkulova@psf.ca.

New Study Is Extremely Embarrassing for Lab-Grown Meat
"It’s not a panacea."


Image byGetty / Futurism


Researchers at UC Davis have made a startling discovery that could change the way we view lab-grown meat.

As detailed in a yet-to-be-peer-reviewed paper, they found that the meat alternative's environmental impact appears to be "orders of magnitude" higher than retail beef you can buy at the grocery store — itself already a very environmentally damaging foodstuff — at least based on current production methods.

If confirmed, the research could be damning: lab-grown meat, long seen as a greener alternative to meat products that don't involve the slaughter of animals, could be more harmful to the environment than the products it's trying to replace.

"Our findings suggest that cultured meat is not inherently better for the environment than conventional beef," said corresponding author Edward Spang, an associate professor at UC Davis, in a statement.\\ 

"It’s not a panacea."

Fortunately, there could be effective ways to reduce that carbon footprint significantly in the long run, the researchers suggest, meaning that it's not game over for lab-grown meat just yet.

Assessing the cycle of energy needed and the greenhouse gas emissions involved in all stages of producing lab-grown meat compared to conventional beef, they found that the global warming potential — an environmental metric measured in kilograms of CO2 emissions — of lab-grown meat is between four and 25 times greater than the average for beef products sold in stores.

One of the biggest drawbacks, they say, is the need for highly-refined growth media, which are the cultures that allow cells to multiply in a lab setting.

"If companies are having to purify growth media to pharmaceutical levels, it uses more resources, which then increases global warming potential," said lead author and doctoral graduate Derrick Risner, in the statement. "If this product continues to be produced using the 'pharma' approach, it’s going to be worse for the environment and more expensive than conventional beef production."

While the Food and Drug Administration approved the sale of cultured meat in the US last year, no such products are being sold in the country as of the time of writing.

That's despite the emergence of a number of new startups, particularly in Silicon Valley, trying to capitalize on the idea. Many of them, it's worth noting, are still struggling to scale up their operations, nevermind break into the mainstream market.

But there's a growing momentum. Back in March, the FDA deemed a cultivated chicken product produced by cultured meat company Good Meat safe to consume, meaning that it will only need an all-clear from the Department of Agriculture to start selling the product.

Lab-grown meat companies have tried to end their reliance on pharmaceutical-grade ingredients and focus on food-grade ones instead, something that would make growing meat in a lab far more environmentally competitive.

"We believe commercial-scale cultivated meat production will be more sustainable, efficient and healthier for the planet than conventional animal agriculture because we will not be raising and slaughtering billions of animals or using one-third of the planet’s ice-free land to grow food for them," Andrew Noyes, vice president and head of global communications at Good Meat, told the San Francisco Chronicle.

If the companies were to make that switch, cultured meat's global warming potential could end up being anywhere between 80 percent lower to 26 percent higher than conventional beef production, according to the researchers.

But ending their reliance on pharma-grade ingredients is still proving extremely difficult.

"It’s possible we could reduce its environmental impact in the future, but it will require significant technical advancement to simultaneously increase the performance and decrease the cost of the cell culture media," said Spang in the statement.

In the meantime, Spang is working with Bay Area companies to develop the tech further. For now, he told the Chronicle that we'll likely see more companies combining cultured meat with other plant-based ingredients to make it more competitive with meat products.

While the numbers paint a damning picture of the current state of the lab-grown meat industry, researchers and cultured meat companies aren't willing to throw in the towel just yet. It may just take a little longer than they might like to get there.


More on lab-grown meat: There's a Serious Problem With Lab-Grown Meat

‘Only going to get worse’: Asia’s record-shattering heatwaves raise fears over climate change

People use fans as they gather in a park amid a heatwave warning in Shanghai, China.   -  Copyright  REUTERS/Aly Song/File Photo
By Euronews Green  with Reuters

The latest heatwave to hit the continent set temperature records in multiple countries including Vietnam, Thailand, and Singapore as well as cities across China.

Countries across Asia have been hit by another round of extreme heat that has toppled seasonal temperature records throughout the region. 

It has raised concerns about the region's ability to adapt to a rapidly changing climate.

After punishing heatwaves struck large parts of the continent in April, temperatures spiked again in late May - normally the start of the cooler monsoon season.

Seasonal highs were registered in China, Southeast Asia and elsewhere. Experts warned that there was more extreme heat to come.

"We can't say that these are events that we need to get used to, and adapt to, and mitigate against because they are only going to get worse as climate change progresses," said Sarah Perkins-Kirkpatrick, a climate scientist with the University of New South Wales in Australia.

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Where have temperature records been broken?

The heatwave in Vietnam, expected to last well into June, has already forced authorities to turn off street lights and ration electricity as air conditioning demand threatened to overwhelm the power grid.

The country recorded its highest temperature ever on 6 May at 44.1C in Thanh Hoa province, about 150 km south of Hanoi. Another province came close to the record on Wednesday31 May, hitting 43.3C.

Vietnam's national weather forecaster warned on Thursday of residential fire risks due to high power consumption. With temperatures set to range from 35C and 39C in the coming days, it also warned of the risks of dehydration, exhaustion and heat strokes.


A woman uses a fan as she wears a cloth that protects her from the sun on a street, amid a heatwave warning in Shanghai.REUTERS/Aly Song/File Photo

In China, Shanghai endured its hottest May day in more than a century on Monday. A day later, a weather station in the southeastern tech manufacturing hub of Shenzhen also set a May record of 40.2C. The heatwave is set to continue across the south for a few more days.

India, Pakistan and southeast Asia already experienced a punishing heatwave in April, causing widespread infrastructure damage and a surge in heat stroke cases. Bangladesh was also at its hottest in 50 years, while Thailand hit a record 45C.

Seasonal temperature records also continued to tumble through May, with steamy Singapore at its hottest for the month in 40 years.

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Is climate change to blame for heatwaves in Asia?

The April heatwave was "30 times more likely" because of climate change, a team of climate researchers said last month. The current temperature spike "is likely to be caused by the same factors," said Chaya Vaddhanaphuti from Thailand's Chiang Mai University, who was part of the team.

India and other countries have established protocols to deal with the health risks arising from extreme heat, opening up public "cool rooms" and imposing restrictions on outdoor work. 

But, Vaddhanaphuti said, governments need to plan better - especially to protect more vulnerable communities.

Researchers from the University of Bristol warned in a paper published in April that regions with little prior experience of extreme heat could be most at risk, identifying eastern Russia as well as the Chinese capital Beijing and surrounding districts among the more vulnerable.


A man carries an air cooler at a market, on a hot summer day in New Delhi, India.ANUSHREE FADNAVIS/REUTERS

But for countries like India, where humidity is already pushing "wet bulb" temperatures to unsafe levels, preparing for the worst might not be enough, said Vikki Thompson, the paper's lead author.

"At some point, we get to the limit of humans actually being able to cope with the temperatures," she said. "There could be a point where nobody could cope with them."

As many as 2 billion people will be exposed to dangerous heat if the world remains on its current track to rise an average of 2.7C this century, with India likely to be the worst hit, scientists warned in another study published last week.

 

Cutting cow numbers isn’t the answer to curbing CO2 emissions, say French farmers

A herd of Charolais cows, in a meadow in Saint Cosmes-en-Vairais northwestern France.
A herd of Charolais cows, in a meadow in Saint Cosmes-en-Vairais northwestern France.   -  Copyright  Jean-François MONIER / AFP
By Rosie Frost

Cattle farmers say calls to cut the number of cows would mean more imported meat.

France needs to have fewer cows to meet climate change commitments, according to the Cour des Comptes - an independent court in charge of auditing public funds.

The French government recently unveiled a plan to speed up cuts in greenhouse gas emissions. It includes a target reduction of 50 per cent by 2030 compared with levels in 1990.

Included in this plan is a goal to reduce emissions from agriculture by almost 20 per cent during the same period - but there aren’t any details yet on how France will do this.

Why does France need to cut its number of cows?

With 17 million cows, cattle farms in France are thought to generate nearly half of all agricultural emissions. Overall, they make up 12 per cent of France’s total emissions.

In its ruling, the court wrote “the state of cattle farming is not favourable for the climate” adding that, despite other efforts to reduce greenhouse gases like fixing carbon in the soil, overall emissions still remained very high.

The report from the Cour des Comptes, released on Monday (22 May), came as Prime Minister Élisabeth Borne presented the new plan to cut carbon emissions across all sectors.


Farmers milk cows on the eve of the opening day of the Agriculture fair in Paris on February 24, 2023.STEPHANE DE SAKU

It asked the Ministry of Agriculture to define its strategy to reduce methane emissions which it says “necessarily requires a significant reduction in the herd”. The court said the ministry had already communicated its aim to reduce cattle herds from 17 million to 15 million by 2035 then 13.5 million by 2050

It also added that France would still be able to produce enough meat to feed its population without imports if the public stuck to guidelines which recommend eating no more than 500g a week.

How have cattle farmers responded to the 

recommended cuts?

French cattle farmers say cutting the number of cows in the country isn’t the answer.

The French Interprofessional Association for Cattle and Meat, Interbev, said in a statement that the fields in which cows graze help capture carbon and protect biodiversity.

It also claimed that the continued reduction in cattle herds would “accentuate the increase in imported meat” asking “Are we really ready to sacrifice our sustainable farming model and food sovereignty?”

“This is why Interbev deplores the fact that the climate issue is too often reduced to carbon issues alone,” the association added.

Minister of Agriculture and Food Security Marc Fesneau made a lengthy post on Twitter in response to the debate. He said that recommendations for a “forced downsizing” were “curious if not out of touch with reality.”

Fesneau asked whether it would mean an increase in imported food and if “in a hypocritical way” these emissions needed to feed the country wouldn’t be counted in its total.

Cour des Comptes pointed out that low earnings and harsh working conditions were already causing farms to downscale or close. The number of cows in France has already dropped from 20.3 million in 2000.

The court recommended that “farmers in difficulty” should be compensated to allow them to “turn to other systems of production” or “change professional direction”.

Rhythmically stimulating the brain with electrical currents could boost cognitive function, according to analysis of over 100 studies

By Shrey Grover, Boston University 
The Conversation
May 28, 2023


Research suggests that brain cells communicate effectively when they coordinate the rhythm of their firing. (File photo: Fakurian Design/Unsplash)

Figuring out how to enhance a person’s mental capabilities has been of considerable interest to psychology and neuroscience researchers like me for decades. From improving attention in high-stakes environments, like air traffic management, to reviving memory in people with dementia, the ability to improve cognitive function can have far-reaching consequences. New research suggests that brain stimulation could help achieve the goal of boosting mental function.

In the Reinhart Lab at Boston University, my colleagues and I have been examining the effects of an emerging brain stimulation technology – transcranial alternating current stimulation, or tACS – on different mental functions in patients and healthy people.

During this procedure, people wear an elastic cap embedded with electrodes that deliver weak electrical currents oscillating at specific frequencies to their scalp. By applying these controlled currents to specific brain regions, it is possible to alter brain activity by nudging neurons to fire rhythmically.Another type of transcranial electric stimulation, tDCS, applies a direct electrical current to the brain.

Why would rhythmically firing neurons be beneficial? Research suggests that brain cells communicate effectively when they coordinate the rhythm of their firing. Critically, these rhythmic patterns of brain activity show marked abnormalities during neuropsychiatric illnesses. The purpose of tACS is to externally induce rhythmic brain activity that promotes healthy mental function, particularly when the brain might not be able to produce these rhythms on its own.



However, tACS is a relatively new technology, and how it works is still unclear. Whether it can strengthen or revive brain rhythms to change mental function has been a topic of considerable debate in the field of brain stimulation. While some studies find evidence of changes in brain activity and mental function with tACS, others suggest that the currents typically used in people might be too weak to have a direct effect.

When faced with conflicting data in the scientific literature, it can be helpful to conduct a type of study called a meta-analysis that quantifies how consistent the evidence is across several studies. A previous meta-analysis conducted in 2016 found promising evidence for the use of tACS in changing mental function. However, the number of studies has more than doubled since then. The design of tACS technologies has also become increasingly sophisticated.

We set out to perform a new meta-analysis of studies using tACS to change mental function. To our knowledge, this work is the largest and most comprehensive meta-analysis yet on this topic, consisting of over 100 published studies with a combined total of more than 2,800 human participants.

After compiling over 300 measures of mental function across all the studies, we observed consistent and immediate improvement in mental function with tACS. When we examined specific cognitive functions, such as memory and attention, we observed that tACS produced the strongest improvements in executive function, or the ability to adapt in the face of new, surprising or conflicting information.

We also observed improvements in the ability to pay attention and to memorize information for both short and long periods of time. Together, these results suggest that tACS could particularly improve specific kinds of mental function, at least in the short term.

To examine the effectiveness of tACS for those particularly vulnerable to changes in mental function, we examined the data from studies that included older adults and people with neuropsychiatric conditions. In both populations, we observed reliable evidence for improvements in cognitive function with tACS.

Interestingly, we also found that a specialized type of tACS that can target two brain regions at the same time and manipulate how they communicate with each other can both enhance or reduce cognitive function. This bidirectional effect on mental function could be particularly useful in the clinic. For example, some psychiatric conditions like depression may involve a reduced ability to process rewards, while others like bipolar disorder may involve a highly active reward processing system. If tACS can change mental function in either direction, researchers may be able to develop flexible and targeted designs that cater to specific clinical needs.

Developments in the field of tACS are bringing researchers closer to being able to safely enhance mental function in a noninvasive way that doesn’t require medication. Current statistical evidence across the literature suggests that tACS holds promise, and improving its design could help it produce stronger, long-lasting changes in mental function.

Shrey Grover, Ph.D. Candidate in Psychological and Brain Sciences, Boston University

This article is republished from The Conversation under a Creative Commons license. Read the original article.