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Is carbon capture an efficient way to tackle CO2?

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Is carbon capture an efficient way to tackle CO2?
Getty Images A bank of fans draws air through specialized filters at Climeworks' Mammoth carbon removal plantGetty Images

Climeworks’ Icelandic plant captures CO2 direct from the atmosphere

It could be a scene from science fiction. Towering over dark, mossy lava fields are stacks of noisy machines the size of shipping containers, domes, and zig-zagging silver pipes.

Found 30km (19 miles) southwest of Iceland’s capital Reykjavik, this is the world’s largest direct air capture (DAC) facility.

Called Mammoth, it has been developed by Swiss firm Climeworks.

It has been running for two months, sucking global-warming carbon dioxide (CO2) out of the air, then storing it deep underground where it turns to stone.

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Twelve collector containers are now installed, but in the coming months 72 of them will circle the large processing hall.

“That will enable us to capture 36,000 tons of CO2 every year,” Climeworks’ chief commercial officer, Douglas Chan, tells the BBC.

The idea is to reverse emissions that have already been pumped into the atmosphere.

Each collector unit has a dozen powerful fans, which, every 40 seconds, can suck up enough air to fill an Olympic swimming pool.

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“The technology relies on sucking in lots and lots of air, slowing it down so that the filter can capture it, and then venting the air back out the end,” says Mr Chan.

A white dome in foreground and steam over the carbon capture plant in the distance

CO2-laden water is pumped underground where it turns to rock

CO2 only makes up a tiny proportion of the atmosphere (0.04%), so capturing it requires a lot of electricity.

For Mammoth that electricity comes from a neighbouring geothermal power plant, so, while operating, the plant is emissions free.

Once full, the collection chambers are flushed out with hot steam, which is piped into the processing hall.

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Inside the hall, Mr Chan points out two enormous balloons overhead, which together hold a single tonne of CO2.

That captured CO2 is then mixed with fresh water, in an adjacent tower.

“It’s almost like a shower,” explains Dr Martin Voigt, from Icelandic firm Carbfix, which has developed a process to turn CO2 into stone.

“From the top, water trickles down. The CO2 is coming up, and we dissolve the CO2.”

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Hidden inside two white, igloo-like domes nearby are injection wells, where the CO2-laden water is pumped more than 700m underground.

Pipe work and the large balloon holding CO2 inside the carbon capture facility

The suspended container can hold around half a tonne of CO2

“This is a fresh basalt here,” says Dr Voight, showing me a lump of black rock taken from a recent volcanic eruption, and riddled with tiny holes. “You can see there’s a lot of porosity.”

Iceland has an abundance of volcanic basalt, and this bedrock acts like a storage reservoir. When the carbon meets other elements found in the basalt, a reaction kicks off and it solidifies, locking it away as carbonate minerals.

“Here you can see a lot of these pores are now filled with whitish specks,” says Dr Voight, handling a sample of drilled out rock.

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“Some of these are carbonate minerals. They contain the mineralised CO2.”

The process is quick, claims Dr Voight enthusiastically. “We’re not talking about millions of years.”

“Around 95% of the CO2 was mineralised within two years in the pilot project. This is incredibly fast. On geological timescales at least.”

A man holds a cylindrical piece of black Icelandic bedrock with captured white carbon

Iceland’s bedrock is well suited for storing CO2

Capable of removing 36,000 tonnes of CO2 a year, an amount similar to taking 8,000 petrol cars off the road, Mammoth is almost 10 times larger than Climeworks’ first commercial plant called Orca.

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It costs Climeworks almost $1,000 (£774) to capture and store a tonne of CO2. To make money it sells carbon offsets to clients.

“Mammoth has already sold close to a third of its lifetime capacity,” states Mr Chan, who believes technological improvements and scaling up, will drive down future costs.

“By the end of the decade, we want to be at a cost of capture of between $300 and $400.”

Among its customers are Microsoft, H&M, JP Morgan Chase, Shopify and Lego; as well as over 20,000 individuals who subscribe on Climeworks’ website.

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“We’re following the science,” Microsoft’s senior director of energy and carbon removal, Brian Marrs, previously told the BBC.

“Carbon removal has to be part of the equation. You can’t reduce emissions that are already in the atmosphere, you have to remove them.”

Eventually Mammoth will be dwarfed by US-based Project Cypress, which breaks ground in 2026, and which Climeworks hopes will remove up to a million tonnes of CO2 annually, using new technology which it claims will be cheaper and more energy efficient.

Climeworks’ Douglas Chan stands in front of large vents - part of the carbon capture plant

Douglas Chan says it costs almost $1,000 to capture a tonne of carbon

DAC technology is, however, not without critics who think its over-hyped, pointing to high costs, high energy consumption and limited scale.

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Those critics would argue that capturing CO2 where it is emitted would be far more efficient.

“It’s much easier to remove the carbon dioxide directly from smokestacks,” says Dr Edvard Júlíus Sólnes, a professor at the University of Iceland and former Icelandic Environment Minister.

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Despite repeated calls to curb emissions, a record amount of planet-heating CO2 was churned out last year.

The UN’s Intergovernmental Panel on Climate Change has warned that emissions must be urgently slashed, but that still won’t be enough to prevent harmful global warming.

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Many climate scientists agree that carbon removal will also be necessary but this also divides opinion. Multiple methods have emerged, and some caution against reliance on so-called techno-fixes, which might discourage polluters from changing their ways.

Currently no carbon removal is taking place at anywhere near the scale that would be needed.

“We release about 40 billion tonnes of carbon dioxide into the atmosphere every year, so this [DAC] won’t make a dent in the big problem,” says Dr Sólnes.

“We need to divest from fossil fuels and find other sources of energy,” he asserts. “But I think we should use all methods to fight this problem.”

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More DAC projects are getting off the ground. According to the International Energy Agency, 27 plants have been commissioned worldwide, but only four of them capture more than 1,000 tonnes of CO2 annually.

Plans for further 130 facilities are also on the drawing board, and around $3.5bn has also been earmarked by the US government to kickstart three large-scale hubs aimed at eventually removing a mega-tonne of CO2, per year.

However, Doug Chan is convinced that DAC can help battle global warming. “I really do believe direct air capture and other engineered solutions are going to get us to the point that we need to help fight climate change.”

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Horseshoe crabs: Ancient creatures who are a medical marvel

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Horseshoe crabs: Ancient creatures who are a medical marvel


Horseshoe crabs: Ancient creatures who are a medical marvel – CBS News

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Correspondent Conor Knighton visits New Jersey beaches along the Delaware Bay to learn about horseshoe crabs – mysterious creatures that predate dinosaurs – whose very blood has proved vital to keeping humans healthy by helping detect bacterial endotoxins. He talks with environmentalists about the decline in the horseshoe crab population, and with researchers who are pushing the pharmaceutical industry to switch its use of horseshoe crab blood with a synthetic alternative used in medical testing.

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NYT Strands today — hints, answers and spangram for Friday, September 20 (game #201)

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NYT Strands homescreen on a mobile phone screen, on a light blue background

Strands is the NYT’s latest word game after the likes of Wordle, Spelling Bee and Connections – and it’s great fun. It can be difficult, though, so read on for my Strands hints.

Want more word-based fun? Then check out my Wordle today, NYT Connections today and Quordle today pages for hints and answers for those games.

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SpaceX to launch bitcoin entrepreneur and three crewmates on flight around Earth’s poles

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SpaceX to launch bitcoin entrepreneur and three crewmates on flight around Earth's poles


A blockchain entrepreneur, a cinematographer, a polar adventurer and a robotics researcher plan to fly around Earth’s poles aboard a SpaceX Crew Dragon capsule by the end of the year, becoming the first humans to observe the ice caps and extreme polar environments from orbit, SpaceX announced Monday.

The historic flight, launched from the Kennedy Space Center in Florida, will be commanded by Chun Wang, a wealthy bitcoin pioneer who founded f2pool and stakefish, “which are among the largest Bitcoin mining pools and Ethereum staking providers,” the crew’s website says.

081224-fram2-crew.jpg
The Fram2 crew, seen during a visit to SpaceX’s Hawthorn, Calif., manufacturing facility. Left to right: Eric Philips, Jannicke Mikkelse, commander Chun Wang and Rabea Rogge.

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SpaceX


“Wang aims to use the mission to highlight the crew’s explorational spirit, bring a sense of wonder and curiosity to the larger public and highlight how technology can help push the boundaries of exploration of Earth and through the mission’s research,” SpaceX said on its website.

Wang’s crewmates are Norwegian cinematographer Jannicke Mikkelsen, Australian adventurer Eric Philips and Rabea Rogge, a German robotics researcher. All four have an interest in extreme polar environments and plan to carry out related research and photography from orbit.

The mission, known as “Fram2” in honor of a Norwegian ship used to explore both the Arctic and Antarctic regions, will last three to five days and fly at altitudes between about 265 and 280 miles.

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“This looks like a cool & well thought out mission. I wish the @framonauts the best on this epic exploration adventure!” tweeted Jared Isaacman, the billionaire philanthropist who charted the first private SpaceX mission — Inspiration4 — and who plans to blast off on a second flight — Polaris Dawn — later this month.

The flights “showcase what commercial missions can achieve thanks to @SpaceX’s reusability and NASA’s vision with the commercial crew program,” Isaacman said. “All just small steps towards unlocking the last great frontier.”

Like the Inspiration4 mission before them, Wang and his crewmates will fly in a Crew Dragon equipped with a transparent cupola giving them a picture-window view of Earth below and deep space beyond.

No astronauts or cosmonauts have ever viewed Earth from the vantage point of a polar orbit, one tilted, or inclined, 90 degrees to the equator. Such orbits are favored by spy satellites, weather stations and commercial photo-reconnaissance satellites because they fly over the entire planet as it rotates beneath them.

The high-inclination record for piloted flight was set in the early 1960s by Soviet Vostok spacecraft launched into orbits inclined 65 degrees. The U.S. record was set by a space shuttle mission launched in 1990 that carried out a classified military mission in an orbit tilted 62 degrees with respect to the equator.

The International Space Station never flies beyond 51.6 degrees north and south latitude. NASA planned to launch a space shuttle on a classified military mission around the poles in 1986, but the flight was canceled in the wake of the Challenger disaster.

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“The North and South Poles are invisible to astronauts on the International Space Station, as well as to all previous human spaceflight missions except for the Apollo lunar missions but only from far away,” the Fram2 website says. “This new flight trajectory will unlock new possibilities for human spaceflight.”

SpaceX has launched 13 piloted missions carrying 50 astronauts, cosmonauts and private citizens to orbit in nine NASA flights to the space station, three commercial visits to the lab and the Inspiration4 mission chartered by Isaacman.

Isaacman and three crewmates plan to blast off Aug. 26 on another fully commercial flight, this one featuring the first civilian spacewalks. NASA plans to launch its next Crew Dragon flight to the space station around Sept. 24.

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Finally, a screen that goes anywhere

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Finally, a screen that goes anywhere

Today we’re launching a totally new, totally different app. Meet Orion.

Orion is a small, fun app that helps you use your iPad as an external HDMI display for any camera, video game console, or even VHS. Just plug in one of the bajillion inexpensive adapters, and Orion handles the rest.

But wait — we’re a camera company. Why an HDMI monitor?

We built this to scratch a few itches. First, in professional cinematography, it’s common to connect an external screen to your camera to get a better view of the action. Orion not only gives you a bigger screen, but you can even share screenshots with your crew with a couple of taps.

We also built this for… pure fun. When traveling with a Nintendo Switch, it’s a delight to play games on a bigger screen, especially alongside friends.

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Giant “flying” Joro spiders love big cities. A new study found their ability to chill out in stressful situations may be why

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Giant "flying" Joro spiders love big cities. A new study found their ability to chill out in stressful situations may be why


The saga of the large invasive Joro spiders that parachute through the air isn’t over. A new study found that the critters with 4-inch-long legs are truly built differently, with hearts that are able to withstand the loud and bustling noises of big cities

University of Georgia researcher Andy Davis made the discovery while conducting cardiac stress tests on Joro spiders and their cousin, the golden silk spider. The research, published in Physiological Entomology on Monday, found that the species know how to chill out and stay calm when put in heart rate-raising situations. 

The Joro spider, also known as Trichonephila clavata, “is known for making webs not only in natural green spaces but also in cities and towns, often on buildings and human dwellings,” the study says. “The stress reactions of Trichonephila spiders could be characterized as ‘even-tempered,’ which may factor into their ability to live in habitats with frequent disturbances.”

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Davis and his team evaluated the physiological reactions of Joro spiders and golden silk spiders and compared them to those of another pair of similarly-sized species that are related to each other, garden spiders and banded garden spiders. 

Researchers recorded baseline heart rates of the arachnids while they were resting and inactive, and then recorded their heart rates after restraining them under electronic sensors for 10 minutes.

Spider Takeover
The Joro spider seen in Johns Creek, Georgia, on Oct. 24, 2021.

Alex Sanz / AP

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“When subjected to the novel restraint stress, heart rates of all spider species became elevated, which is an expected reaction that other spider researchers have noted,” the study says. “However, there were differences among species in the magnitude of this elevation, and of how the responses progressed during the 10 min period.”

The garden spiders, both of which belong to the Argiope genus, showed “distinct periods of fluctuations during the restraint” and were even found to struggle against the restraints, researchers said. Joro spiders and their golden silk cousins, on the other hand, were “less variable and more even.” They were also observed entering a state of thanatosis for more than an hour after stressors, meaning they essentially froze up during that time. 

The tests “are beginning to paint a picture of how the invasive Joro spider and its cousin, the golden silk spider, have a unique way of tolerating novel stressors, which may be the reason for their ability to occupy anthropogenic landscapes,” researchers said, noting that other spider species in their family line could share this trait, although that would need further investigation.

Joro spiders have been making headlines for years as they continue to spread up the East Coast. Originally from Asia, the spiders are believed to have been first introduced to north Georgia around 2010. They have since been found across nearly a dozen other states. In December, Davis told The New York Times that New York is “right in the middle of where they like to be.” It’s been predicted that they could pop up in the New York tri-state area this summer, although no reports of such have been made.

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A Joro spider
A Joro spider

Dave Coyle/Clemson University


“They seem to be OK with living in a city,” he told the paper, adding that they’ve been seen hanging out on street lamps and telephone poles, where “regular spiders wouldn’t be caught dead in.” 

The latest findings may not definitively prove that the spiders’ relaxed demeanor is the reason for “their affinity for urban settings,” the study says, adding that more research is needed. It does, however, bolster Davis’ research from February, which also found that Joro spiders don’t necessarily mind the increased noise and vibrations that come with city living. 

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“These Joro webs are everywhere in the fall, including right next to busy roads, and the spiders seem to be able to make a living there. For some reason, these spiders seem urban tolerant,” Davis said of his earlier research. 

UGA student and co-author of that study, Alexa Schultz, agreed, saying, “It looks like Joro spiders are not going to shy away from building a web under a stoplight or an area where you wouldn’t imagine a spider to be.” 

But don’t worry — while the spiders are venomous, they don’t pose a danger to humans, although they may elevate your heart rate more than you elevate theirs.  

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Internet of things | Digital Watch Observatory

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Internet of things | Digital Watch Observatory

Ongoing developments in the field of automated systems, such as self-driving cars, smart agriculture, and medical robots, highlight the increasingly important interplay between the IoT, artificial intelligence (AI), and big data. AI, a field that is developing extremely fast, acts as the ‘thinking machine’ for IoT devices. These devices, in turn, generate significant amounts of data – sometimes labeled as big data. This data is analysed and used for the verification of the initial AI algorithms and for the identification of new cognitive patterns that could be integrated into new AI algorithms.

One of the most salient examples of this interplay can be found in smart cities: IoT sensors can collect data from transportation systems, water supply networks, and waste management facilities, and after analysis, this data can be used to improve the functioning of these systems.

Big data, AI, and IoT

While this interplay presents enormous business potential, it also brings new challenges in areas such as the labour market, health, education, safety and security, privacy, ethics, and accountability. For example, while AI systems can potentially lead to economic growth, they could also result in significant disruptions to the labour market.

Since AI systems involve computers taking decisions to some extent – replacing certain human processes – there are concerns related to ethics, fairness, justice, transparency, and accountability. The risk of discrimination and bias in decisions made by autonomous technologies is well-illustrated in the debate over Jigsaw’s Conversation AI tool. While it could potentially address problems related to misuse of the Internet public space, the software also raises a major ethical issue: How can machines determine what is and what is not appropriate language?

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