Engineering

Out With PFAS, Considering Alternatives

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PFAS are used as a coating on food packaging and are prevalent in other everyday items like personal care products and textiles.

Triple Pundit, and writer Riya Anne Polcastro, are new to us, and we appreciate their coverage of this complex topic, important both for health and environmental reasons:

Nixing PFAS is a Real Possibility: Here’s One Company That’s Doing It

Per- and polyfluorinated substances (PFAS) have been getting a lot of negative publicity. And with good reason. Classified as “forever chemicals,” they’ve been found in food, water, soil, animals and even our blood. Although the extent of their effects is not fully understood, they are known to negatively impact human health in a variety of ways. But while many are calling for an overall ban on the chemicals, pushback from the industry seeks to simply switch out the PFAS we already know are harmful with lesser-known ones that likely have the same — or possibly even worse — effects. Continue reading →

Bubbles On Ice

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Illustration by Arina Kokoreva

A bit late considering the special issue was published one month ago, but here is another article in a recent series featuring unusual ideas about how to address climate change:

A Heat Shield for the Most Important Ice on Earth

Engineers might be able to protect Arctic ice by coating it with tiny glass bubbles. Should they?

An aerial view of the glass-bubble-covered ice, at left, and the bare ice. Photograph by Doug Johnson

On a clear morning in late March, in rural Lake Elmo, Minnesota, I followed two materials scientists, Tony Manzara and Doug Johnson, as they tromped down a wintry hill behind Manzara’s house. The temperature was in the high thirties; a foot of snow covered the ground and sparkled almost unbearably in the sunlight. Both men wore dark shades. “You don’t need a parka,” Johnson told me. “But you need sunglasses—snow blindness, you know?” At the bottom of the hill, after passing some turkey tracks, we reached a round, frozen pond, about a hundred feet across. Manzara, a gregarious man with bushy eyebrows, and Johnson, a wiry cross-country skier with a quiet voice, stepped confidently onto the ice. Continue reading →

The Future Of Solar In India

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A local farmer grazes his goats along a road overlooking Pavagada Solar Park. Photographs by Supranav Dash for The New Yorker

Difficult to imagine that with all the times India has appeared in these pages, and separately all the times that solar has appeared, this is the first time they appear together:

India’s Quest to Build the World’s Largest Solar Farms

Pavagada Ultra Mega Solar Park, a clean-power plant the size of Manhattan, could be a model for the world—or a cautionary tale.

Ashok Narayanappa drives a bullock cart carrying hay, along a stretch of road lined with pylons, in Pavagada Solar Park.

Every morning in the Tumakuru District of Karnataka, a state in southern India, the sun tips over the horizon and lights up the green-and-brown hills of the Eastern Ghats. Its rays fall across the grasslands that surround them and the occasional sleepy village; the sky changes color from sherbet-orange to powdery blue. Eventually, the sunlight reaches a sea of glass and silicon known as Pavagada Ultra Mega Solar Park. Here, within millions of photovoltaic panels, lined up in rows and columns like an army at attention, electrons vibrate with energy. The panels cover thirteen thousand acres, or about twenty square miles—only slightly smaller than the area of Manhattan. Continue reading →

Viewed From Above, Our Most Important Leaks

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Illustration by Ard Su

David W. Brown offers this updated look at the use of satellite technology for a key metric:

A Security Camera for the Planet

A new satellite, funded by a nonprofit, aims to pinpoint emissions of methane—a gas that plays a major role in global warming.

When his phone rang, Berrien Moore III, the dean of the College of Atmospheric and Geographic Sciences at the University of Oklahoma, was fumbling with his bow tie, preparing for a formal ceremony honoring a colleague. He glanced down at the number and recognized it as nasa headquarters. This was a bad sign, he thought. In Moore’s experience, bureaucrats never called after hours with good news.

It can see large methane concentrations along its orbital path, but can’t pinpoint emissions sources. Illustration by Ard Su

For roughly six years, Moore and his colleagues had been working on a space-based scientific instrument called the Geostationary Carbon Cycle Observatory, or GeoCarb. nasa had approved their proposal in 2016; it was now 2022, and GeoCarb was being built by Lockheed Martin, in Palo Alto, California. Once it was in space and mounted to a communications satellite, GeoCarb would scan land in the Western Hemisphere continuously in strips, taking meticulous measurements of three carbon-based gases: carbon dioxide, carbon monoxide, and methane. It would give scientists a detailed view of the carbon cycle—the process by which carbon circulates through the Earth’s forests, lakes, trees, oceans, ice, and other natural features. Continue reading →

#CargoUnderSail #RethinkShipping

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Illustration by Owen D. Pomery

Pagan Kennedy offers another, more detailed look at an idea that seemed a mere novelty when we first linked to it:

The Climate Crisis Gives Sailing Ships a Second Wind

Cargo vessels are some of the dirtiest vehicles in existence. Can a centuries-old technology help to clean them up?

In February, 1912, Londoners packed a dock on the River Thames to gawk at the Selandia, a ship that could race through the water without any sails or smokestacks. Winston Churchill, then the minister in charge of the British Royal Navy, declared it “the most perfect maritime masterpiece of the twentieth century.” But, as the Selandia continued its journey around the world, some onlookers were so spooked that they called it the Devil Ship…

The history is a fun read, so continue to the whole story here. But then, take a closer look at the company featured in the article:

Our Story

Over the course of 20 years working in the maritime industry Cornelius Bockermann witnessed first hand how humans adversely affect our environment. He knew something had to change. In 2013, he moved with his family to Cairns and shipped all their possessions from Germany to their new home in Australia. Through the process of shipping his own goods he experienced the disconnect between commerce and environmental preservation. Upon learning of plans to expand fossil fuel based shipping along the Queensland coast and amongst the Great Barrier Reef he knew he had to act. The question became how do you offer businesses and consumers a sustainable option in shipping?

Cargo Under Sail is the answer and the Dutch schooner named the AVONTUUR is the vessel to start it.

We are a passionate collective of individuals working to create a supply chain that merges the relationship between commerce and preservation. We are restless and can no longer wait for others to make a change.

Our Mission Zero

To eliminate pollution caused by shipping cargo.

We have a five-stage approach:

1. Raise Awareness about the environmental destruction caused by the shipping industry

2. Model a clean shipping future with our AVONTUUR

3. Sell premium AVONTUUR products to support the ongoing operation of the project.

4.  Establish a demand for products shipped by sail

5. Build a modern sail cargo fleet

Dam Damage Done

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A dried-up reservoir behind a dam in North Karnataka, India. LAKSHMIPRASAD S. / ALAMY STOCK PHOTO

A couple of our earliest posts was about life around a dam in India, so the photo heading this article rings a bell of sorts:

As Projects Decline, the Era of Building Big Dams Draws to a Close

Escalating construction costs, the rise of solar and wind power, and mounting public opposition have led to a precipitous decrease in massive new hydropower projects. Experts say the world has hit “peak dams,” which conservationists hail as good news for riverine ecosystems.

The end of the big dam era is approaching. Continue reading →

Sailing Cargo Ships, Again

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An illustration shows a wind-powered car and truck carrier ship that a Swedish consortium is developing and aiming to launch late 2024. Photograph: Wallenius Marine/Reuters

Old school (sailing cargo ships) becoming the new trend is as good as news gets these days:

Cargo ships powered by wind could help tackle climate crisis

Shipping produces much of the world’s greenhouse gases but new technology offers solutions to cut fuel use

Cars, trucks and planes get plenty of blame for helping drive the climate crisis, but shipping produces a large portion of the world’s greenhouse gases, as well as nitrogen oxides and sulphur pollution because ships largely use cheap heavy fuel oil. Continue reading →

Bio-Based Gains

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Scientists at San Diego-based Genomatica, which is developing a plant-based nylon. GENOMATICA

We have been watching and waiting for this range of products to have their day, and Jim Robbins delivers an up to date account that gives hope:

From Lab to Market: Bio-Based Products Are Gaining Momentum

A 3D-printed house made from sawdust and other timber industry waste by the University of Maine’s Advanced Structures and Composites Center. UNIVERSITY OF MAINE

Propelled by government investment and shareholder demand, manufacturers are pushing to get bio-based products into the marketplace. These new materials — made from plants, fungi, and microbes — aim to replace those that contain toxins and are difficult to recycle or reuse.

In the 1930s, the DuPont company created the world’s first nylon, a synthetic polymer made from petroleum. The product first appeared in bristles for toothbrushes, but eventually it would be used for a broad range of products, from stockings to blouses, carpets, food packaging, and even dental floss.

Nylon is still widely used, but, like other plastics, it has environmental downsides: it is made from a nonrenewable resource; its production generates nitrous oxide, a potent greenhouse gas; it doesn’t biodegrade; and it sheds microfibers that end up in food, water, plants, animals, and even the clouds.

Laminated timber beams and floors used in the construction of Ascent, a 25-story apartment building in Milwaukee. THORNTON TOMASETTI

Now, however, a San Diego-based company called Genomatica is offering an alternative: a so-called plant-based nylon made through biosynthesis, in which a genetically engineered microorganism ferments plant sugars to create a chemical intermediate that can be turned into nylon-6 polymer chips, and then textiles. The company has partnered with Lululemon, Unilever, and others to manufacture this and other bio-based products that safely decompose. Continue reading →

Reducing Cement’s Carbon Footprint, Improving Its Longevity

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PHOTOGRAPH: GETTY IMAGES

Whether we want buildings to last longer or not, we now know that reducing the carbon footprint of the materials used is a consideration is important:

The Secret to Making Concrete That Lasts 1,000 Years

Scientists have uncovered the Roman recipe for self-repairing cement—which could massively reduce the carbon footprint of the material today.

ROME’S PANTHEON STANDS defiant 2,000 years after it was built, its marble floors sheltered under the world’s largest unreinforced concrete dome. For decades, researchers have probed samples from Roman concrete structures—tombs, breakwaters, aqueducts, and wharves—to find out why these ancient buildings endure when modern concrete may crumble after only a few decades. Continue reading →

The Remarkable Efficiency Of Heat Pumps, Explained

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Heat pumps use electricity to compress a refrigerant, raising its temperature. IEA

Heat pumps have only been a passing reference occasionally in these pages, but today they are the focus, thanks to Paul Hockenos in Yale e360:

In Europe’s Clean Energy Transition, Industry Turns to Heat Pumps

With soaring gas prices due to the Ukraine war and the EU’s push to cut emissions, European industries are increasingly switching to high-temperature, high-efficiency heat pumps. Combined with the boom in residential use, the EU is now hoping for a heat pump revolution.

An industrial heat pump at the Mars Confectionery in Veghel, the Netherlands. GEA

The Wienerberger brickworks in Uttendorf, Austria, in the Tyrolean Alps, has always required a steady stream of 90 degree C (194 degree F) heat to dry its construction blocks. This process would have been an expensive proposition for the company after Russia cut gas exports to Europe, as it was for most of Europe’s energy-intensive construction industry. But four years ago, Wienerberger — the largest brick producer in the world — made an investment in the future that is now paying off: it replaced Uttendorf’s gas-fired boiler with an industrial-scale heat pump, which whittles the factory’s energy bill by around 425,00 euros a year. Continue reading →

EV Boom

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Ibrahim Rayintakath

At this point we should not be surprised but the momentum is still stunning:

Electric Vehicles Keep Defying Almost Everyone’s Predictions

It is striking that in the same year that Tesla’s stock price dropped by about two-thirds, destroying more than $700 billion in market value, the global market for electric vehicles — which for so long the company seemed almost to embody — actually boomed. Continue reading →

Great EV Expectations

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A Rivian R1T electric pickup truck at the company’s factory in Normal, Illinois. JAMIE KELTER DAVIS / BLOOMBERG VIA GETTY IMAGES

I had no reason to bet against Tesla until now, but I did wonder whether it was good for anyone (other than its shareholders) for that one company to dominate its market over the longer term. Now, happily, it looks like the market will do what we need it to do, which is get robust:

For U.S. Companies, the Race for the New EV Battery Is On

Spurred by federal mandates and incentives, U.S. manufacturers are pushing forward with developing new battery technologies for electric vehicles. The holy grail is a battery that is safer, costs less, provides longer driving range, and doesn’t use imported “conflict” minerals.

Sixteen years have passed since engineer Martin Eberhard unveiled his futuristic custom-designed sports car before a crowd of investors, journalists, and potential buyers in a Santa Monica Airport hangar. Continue reading →

Precision Fermentation’s Implied Potential

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Illustration: Eleanor Shakespeare/The Guardian

It is the first time we are seeing these two words together, and George Monbiot has this to say about the potential implied:

Embrace what may be the most important green technology ever. It could save us all

Never mind the yuck factor: precision fermentation could produce new staple foods, and end our reliance on farming

So what do we do now? After 27 summits and no effective action, it seems that the real purpose was to keep us talking. If governments were serious about preventing climate breakdown, there would have been no Cops 2-27. The major issues would have been resolved at Cop1, as the ozone depletion crisis was at a single summit in Montreal. Continue reading →

Carbon Burial Venturing

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Port Arthur’s Motiva Oil Refinery.PHOTOGRAPH: KATIE THOMPSON

The capturing of carbon is a concept we have been working to understand, but questions about where it goes  and how it is stored, have been fuzzy until now (thanks to Jeffrey Ball at Wired):

Tip Meckel holds a sandstone sample. PHOTOGRAPH: KATIE THOMPSON

The Big Business of Burying Carbon

The porous rock beneath the Gulf Coast launched the petroleum age. Now entrepreneurs want to turn it into a gigantic sponge for storing CO2.

SOMETIME AFTER THE dinosaurs died, sediment started pouring into the Gulf of Mexico. Hour after hour the rivers brought it in—sand from the infant Rockies, the mucky stuff of ecosystems. Year after year the layers of sand hardened into strata of sandstone, pushed down ever deeper into the terrestrial pressure cooker. Continue reading →

Air Conditioning 2.0

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The new mechanism (pictured) could replace traditional vapor-compression cooling technology, which has remained largely unchanged since the early 20th century.

Oddly, we have only mentioned air conditioning twice before in our pages since 2011. So much of the human population is in need of it, and its carbon footprint is so problematic, it presents a significant challenge to efforts to mitigate climate change. Here is reason to mention it again:

Assistant Professor of Chemistry Jarad Mason (left) and co-author Jinyoung Seo have developed a new class of solid-state refrigerants that could enable energy-efficient and emission-free cooling. Jon Chase/Harvard Staff Photographer

Keeping cool without warming the planet

A summer dilemma worthy of Solomon: how to stay cool in days of high heat and humidity without turning to traditional air conditioning, which consumes vast amounts of electricity and emits potent climate-changing greenhouse gases.

The answer potentially involves a new class of solid-state refrigerants that could enable energy-efficient and emission-free cooling. Continue reading →

Sylvia Earle, Her Deepness

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Sylvia Earle. Illustration by João Fazenda

Yesterday’s post got me looking back at our attention to marine science over the years, making me wonder whether we have given that topic its fair share. Yes, probably, but more is needed. I already knew this name because it has appeared in our pages a few times over the years. But just recently I heard her name from two different people who have had the chance to know her personally. One of them, when I mentioned the name, replied with Her Deepness replacing Sylvia Earle’s given name. Thanks to Dana Goodyear, who had me at puma, but who also knows a thing or two about water, now this:

Without Sylvia Earle, We’d Be Living on Google Dirt

The marine biologist and aquanaut evokes a Bond girl with a Ph.D. To save a species, she says, you have to know it.

Do you like to breathe?” This is a question that the marine biologist and deep-sea explorer Sylvia Earle asks frequently. The ocean produces half of the oxygen on Earth. If it dies, humanity can’t survive, so humans better pay attention to it. Continue reading →

Critical Mass On Greener Steel

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Getty

Greening the production of steel has been the topic of exactly one previous post, which linked to an article by Matthew Hutson from last September that made passing reference to the company featured in the article below. Maybe we are getting closer to critical mass:

Steelmaking Cannot Go On This Way

Roughly a tenth of global carbon emissions comes from the steel industry. Doing something about that is easier said than done.

In the city of Woburn, Massachusetts, a suburb just north of Boston, a cadre of engineers and scientists in white coats inspected an orderly stack of brick-size, gunmetal-gray steel ingots on a desk inside a neon-illuminated lab space.

What they were looking at was a batch of steel created using an innovative manufacturing method, one that Boston Metal, a company that spun out a decade ago from MIT, hopes will dramatically reshape the way the alloy has been made for centuries. Continue reading →

Mosquito GMO News

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Biotechnology firm Oxitec ran the first open-air test of genetically modified mosquitoes in the United States by placing boxes of its eggs in selected spots in the Florida Keys. Credit: Joe Raedle/Getty

Genetically modified this and that have been concerns of ours for most of the time we have been posting on environmental issues and nature news. This news below may be the best test of how tolerant one might become about a technology that is inherently full of danger–of the unintended consequences variety more than the known in advance variety–and yet could tame some of the greatest natural pests that mankind suffers from:

Biotech firm announces results from first US trial of genetically modified mosquitoes

Oxitec reports that its insects behaved as planned — but a larger trial is needed to learn whether they can reduce wild mosquito populations.

Researchers have completed the first open-air study of genetically engineered mosquitoes in the United States. The results, according to the biotechnology firm running the experiment, are positive. But larger tests are still needed to determine whether the insects can achieve the ultimate goal of suppressing a wild population of potentially virus-carrying mosquitoes. Continue reading →

Carbon, Sequestration & Hope

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(Brandon Thibodeaux / The New York Times / Redux)

When I read about a promising new technology related to carbon sequestration, I am ambivalent based on the experience of many past false hopes. Carbon is a very large problem. Finding new methods of sequestration is a very challenging puzzle.

I track such developments every week by reading the newsletter that Bill McKibben posts on Substack. Most weeks I post something here from that, and do my best to balance the terrifying and enraging with the more hopeful news he occasionally shares there.

The only other newsletter I read regularly is Robinson Meyer’s newsletter for the Atlantic, called The Weekly Planet. Here is one of his worth reading for a bit of encouragement (when you click the hyperlink it will go to the current newsletter, which until April 20 is this one; after April 20 scroll to find this edition):

The Biggest Investment Ever in Sucking Carbon Out of the Sky

The world’s biggest tech companies are getting serious about carbon removal, the still-nascent technology wherein humanity can pull heat-trapping carbon dioxide out of the atmosphere. Yesterday, an alliance of prominent Silicon Valley companies—including Google, Meta, Shopify, and the payment company Stripe—announced that it is purchasing $925 million in carbon removal over the next eight years. In a world awash in overhyped corporate climate commitments, this is actually a big deal. Continue reading →