Social Networks

Threads Adds 35 Million More Members in November - But Bluesky's Traffic is Surging (theverge.com) 86

At the start of November Threads had 275 million members. But in 30 days it's apparently increased another 12%, reports The Verge: Threads has accrued over 35 million signups so far in November and is "going on three months with more than a million signups a day," Meta spokesperson Alec Booker told The Verge in an email today. 20 million of those signups have come since November 14th, as Axios notes...

At the same time, Bluesky has seen a surge of interest. The platform grew to 15 million users earlier this month and continued to add about a million signups per day for several days. It now sits at over 22 million users.

Dave Earley, audience editor at Guardian Australia, says that traffic to TheGuardian.com from BlueSky "is already 2x that of Threads." [T]hat's on a straight threads.net vs bsky.app referral comparison. BUT! 75-80% of tracked referral from owned Bluesky account posts is NOT being attributed to bsky.app, so I'm certain organic traffic would be undercounting by that much as well. By which I mean, I'm pretty sure traffic from bsky.app to theguardian.com is *significantly* higher than the very obvious 2x that of Threads.
That post was in response to one by a platform VP for the Boston Globe newspaper, who'd reported that traffic from Bluesky to bostonglobe.com "is already 3x that of Threads, and we are seeing 4.5x the conversions to paying digital subscribers."

And Axios notes that Bluesky's growth "has spurred inbound interest for a new investment round, just weeks after raising $15 million in Series A funding, per Axios' Dan Primack."

In response, Threads "rolled out a series of changes over the past week in what was seen as an attempt to keep an edge over Bluesky," reports The Hill: The changes included a new custom feed feature, which gives users the ability to build their feeds around the topics and people they are most interested in. Bluesky lets users make their own lists and feeds and set their own content moderation preferences. The platform also rolled out a few "long-overdue improvements" to its search and trending now features and its algorithm.
United Kingdom

UK Lawmakers Vote in Support of Assisted Dying (cnn.com) 127

British members of parliament have voted to legalize assisted dying, approving a contentious proposal that would make the United Kingdom one of a small handful of nations to allow terminally ill people to end their lives. From a report: Lawmakers in the House of Commons voted by 330 to 275 to support the bill, after an hours-long debate in the chamber and a years-long campaign by high-profile figures that drew on emotional first-hand testimony.

Britain is now set to join a small club of nations to have legalized the process, and one of the largest by population to allow it. The bill must still clear the House of Lords and parliamentary committees, but Friday's vote marked the most important hurdle.

It allows people with a terminal condition and less than six months to live to take a substance to end their lives, as long as they are capable of making the decision themselves. Two doctors, and then a High Court judge, would need to sign off on the choice. Canada, New Zealand, Spain and most of Australia allow assisted dying in some form, as do several US states including Oregon, Washington and California.

Network

Meta Plans $10 Billion Global 'Mother of All' Subsea Cables 63

Meta plans to build a $10 billion private, "mother of all" undersea fiber-optic cable network spanning over 40,000 kilometers around the world, according to TechCrunch. The project, dubbed "W" for its shape, would run from the U.S. east coast to the west coast via India, South Africa and Australia, avoiding regions prone to cable sabotage including the Red Sea and South China Sea.

The social media giant, which co-owns 16 existing cable networks, aims to gain full control over traffic prioritization for its services. The project mirrors Google's strategy of private cable ownership. The construction could take 5-10 years to complete.
Australia

Big Tech Slams Australia's Youth Social Media Ban 128

Major technology companies criticized Australia's new law banning social media access for users under 16, which passed parliament on Thursday with bipartisan support. The legislation threatens fines up to $32 million for platforms failing to block minors. TikTok warned the ban could drive young users to riskier online spaces, while Meta called it a "predetermined process," questioning the rushed parliamentary review that gave stakeholders only 24 hours for submissions. Reuters adds: Snapchat parent Snap said it leaves many questions unanswered. [...] Sunita Bose, managing director of Digital Industry Group, which has most social media companies as members, said no one can confidently explain how the law will work in practice. "The community and platforms are in the dark about what exactly is required of them," she said.
Australia

Australia To Ban Under-16s From Social Media After Passing Landmark Law (yahoo.com) 214

Australia will ban children under 16 from using social media after its senate approved what will become a world-first law. From a report: Children will be blocked from using platforms including TikTok, Instagram, Snapchat and Facebook, a move the Australian government argue is necessary to protect their mental health and wellbeing.

The online safety amendment (social media minimum age) bill will impose fines of up to 50 million Australian dollars ($32.5 million) on platforms for systemic failures to prevent young children from holding accounts. It would take effect a year after the bill becomes law, allowing platforms time to work out technological solutions that would also protect users' privacy. The senate passed the bill 34 votes to 19. The house of representatives overwhelmingly approved the legislation 102 votes to 13 on Wednesday.

Technology

'Enshittification' Is Officially the Biggest Word of the Year (gizmodo.com) 166

The Macquarie Dictionary, the national dictionary of Australia, has picked "enshittification" as its word of the year. Gizmodo reports: The Australians define the word as "the gradual deterioration of a service or product brought about by a reduction in the quality of service provided, especially of an online platform, and as a consequence of profit-seeking." We've all felt this. Google search is filled with garbage. The internet is clogged with SEO-farming websites that clog up results. Facebook is an endless stream of AI-generated slop. Zoom wants you to test out its new AI features while you're trying to go into a meeting. Twitter has become X, and its owner thinks sharing links is a waste of time. Last night I reinstalled Windows 11 on a desktop machine and got pissed as it was finalized and Microsoft kept trying to get me to install OneDrive, Office 360, Call of Duty Black Ops 6, and a bunch of other shit I didn't want. Writer and activist Cory Doctorow coined the term enshittification in 2022, and recently offered potential solutions to the age-old phenomenon in an interview with The Register.

"We need to have prohibition and regulation that prohibits the capital markets from funding predatory pricing," he explained. "It's very hard to enter the market when people are selling things below cost. We need to prohibit predatory acquisitions. Look at Facebook: buying Instagram, and Mark Zuckerberg sending an email saying we're buying Instagram because people don't like Facebook and they're moving to Instagram, and we just don't want them to have anywhere else to go."
Space

SpaceX Launches Massive Starship On Its Sixth Test Flight (space.com) 103

SpaceX's Starship rocket successfully completed its sixth launch today. Not only did it carry the first-ever payload but it also briefly re-lit one of its six Raptor engines about 38 minutes into flight, a crucial milestone for future space missions. Space Magazine reports: SpaceX landed Starship's huge first-stage booster, known as Super Heavy, back at the launch tower on the vehicle's most recent flight, which occurred on Oct. 13. The company aimed to repeat that feat -- which the tower achieved with its "chopstick" arms -- today, but the flight data didn't support an attempt. "We tripped a commit criteria," SpaceX's Dan Huot said during the company's Flight 6 webcast. So Super Heavy ended up coming down for a controlled splashdown in the Gulf of Mexico instead, hitting the waves seven minutes after liftoff.

Today's mission aimed to do far more than just bring Super Heavy back to Earth in one piece. SpaceX also wanted to put Starship's upper stage -- a 165-foot-tall (50 m) spacecraft called Starship, or simply "Ship" -- through its paces. The launch sent Ship on the same semi-orbital trajectory that it took on Flight 5, targeting a splashdown in the Indian Ocean off the northwestern coast of Australia about 65 minutes after liftoff. But Ship also achieved some new milestones along the way this time. For example, Flight 6 carried the first-ever Starship payload -- a plush banana onboard Ship, which served as a zero-gravity indicator. (It was not deployed into space.) In addition, Ship briefly re-lit one of its six Raptor engines about 38 minutes into the flight. (Super Heavy also employs Raptors -- a whopping 33 of them.)

This burn helped show that Ship can perform the maneuvers needed to come back to Earth safely during orbital missions. Indeed, Ship is designed to be fully and rapidly reusable, just like Super Heavy; SpaceX eventually intends to catch it with the chopstick arms as well, and will likely try to do so on a test flight in the near future. Flight 6 also tested modifications to Ship's heat shield, which protects the vehicle during reentry to Earth's atmosphere.

Australia

Australia To Make Big Tech Liable For Citizens' Online Safety (yahoo.com) 79

An anonymous reader quotes a report from Bloomberg: The Australian government plans to enact laws requiring big tech firms to protect its citizens online, the latest move by the center-left Labor administration to crack down on social media including through age limits and curbs on misinformation. Communications Minister Michelle Rowland announced the government's plan for a legislated Digital Duty of Care in Australia on Wednesday night, saying it aligned with similar laws in the UK and European Union. "It is now time for industry to show leadership, and for social media to recognize it has a social responsibility," Rowland said in a speech in Sydney announcing the measures. It would "keep users safe and help prevent online harms."

In response to the laws, Facebook and Instagram operator Meta Platforms Inc. called for the restrictions to be handled by app stores, such as those run by Google and Apple Inc., rather than the platforms themselves. The government has ignored those requests, but has yet to announce what fines companies would face or what age verification information will need to be provided. At the same time, Albanese has moved forward controversial laws to target misinformation and disinformation online, which opponents have labeled an attack on freedom of speech.
Earlier this month, Albanese said the government would legislate for a ban on social media for children under 16, a policy the government says is world-leading. "Social media is doing harm to our kids and I'm calling time on it," Albanese told a news conference.
Australia

Australia Proposes Ban On Social Media For Those Under 16 (reuters.com) 112

An anonymous reader quotes a report from Reuters: Australia Prime Minister Anthony Albanese said on Thursday the government would legislate for a ban on social media for children under 16, a policy the government says is world-leading. "Social media is doing harm to our kids and I'm calling time on it," Albanese told a news conference. Legislation will be introduced into parliament this year, with the laws coming into effect 12 months after it is ratified by lawmakers, he added. There will be no exemptions for users who have parental consent.

"The onus will be on social media platforms to demonstrate they are taking reasonable steps to prevent access," Albanese said. "The onus won't be on parents or young people." Communications Minister Michelle Rowland said platforms impacted would include Meta Platforms' Instagram and Facebook, as well as Bytedance's TikTok and Elon Musk's X. Alphabet's YouTube would likely also fall within the scope of the legislation, she added.

Power

Oil Giant BP is Killing 18 Hydrogen Projects, Chilling the Nascent Industry (techcrunch.com) 52

An anonymous reader shares a report: Tucked inside a 32-page earnings report, oil and gas giant BP revealed it was killing 18 early-stage hydrogen projects, a move that could have a chilling effect on the nascent hydrogen industry. The decision, along with the sale of the company's U.S. on-shore wind power operations, will save BP $200 million annually and help boost its bottom line. The hydrogen industry, which has relied on oil and gas companies both financially and through lobbying efforts, is preparing for a grimmer outcome.

BP has been a supporter of hydrogen. The company's venture capital arm has invested in several green hydrogen startups, including Electric Hydrogen and Advanced Ionics. Earlier this year, BP said it would develop "more than 10" hydrogen projects in the U.S., Europe, and Australia. Now, BP is scaling back those plans, saying it'll develop between five and ten projects. The company is keeping quiet about which ones will receive the green light.

AI

Meta Permits Its AI Models To Be Used For US Military Purposes (nytimes.com) 44

An anonymous reader quotes a report from the New York Times: Meta will allow U.S. government agencies and contractors working on national security to use its artificial intelligence models for military purposes, the company said on Monday, in a shift from its policy that prohibited the use of its technology for such efforts. Meta said that it would make its A.I. models, called Llama, available to federal agencies and that it was working with defense contractors such as Lockheed Martin and Booz Allen as well as defense-focused tech companies including Palantir and Anduril. The Llama models are "open source," which means the technology can be freely copied and distributed by other developers, companies and governments.

Meta's move is an exception to its "acceptable use policy," which forbade the use of the company's A.I. software for "military, warfare, nuclear industries," among other purposes. In a blog post on Monday, Nick Clegg, Meta's president of global affairs, said the company now backed "responsible and ethical uses" of the technology that supported the United States and "democratic values" in a global race for A.I. supremacy. "Meta wants to play its part to support the safety, security and economic prosperity of America -- and of its closest allies too," Mr. Clegg wrote. He added that "widespread adoption of American open source A.I. models serves both economic and security interests."
The company said it would also share its technology with members of the Five Eyes intelligence alliance: Canada, Britain, Australia and New Zealand in addition to the United States.
Government

What's Worse Than Setting Clocks Back an Hour? Permanent Daylight Savings Time (usatoday.com) 198

"It's that time again," writes USA Today, noting that Sunday morning millions of Americans (along with millions more in Canada, Europe, parts of Australia, and Chile) "will set their clocks back an hour, and many will renew their twice-yearly calls to put an end to the practice altogether..." Experts say the time changes are detrimental to health and safety, but agree that the answer isn't permanent DST. "The medical and scientific communities are unified ... that permanent standard time is better for human health," said Erik Herzog, a professor of biology and neuroscience at Washington University in St. Louis and the former president of the Society for Research on Biological Rhythms...

Springing forward an hour in March is harder on us than falling back in November. The shift in spring is associated with an increase in heart attacks, and car accident rates also go up for a few days after, he said. But the answer isn't permanent daylight saving time, according to Herzog, who said that could be even worse for human health than the twice-yearly changes. By looking at studies of people who live at the easternmost edge of time zones (whose experience is closest to standard time) and people who live at the westernmost edge (more like daylight saving time), scientists can tell that health impacts of earlier sunrises and sunsets are much better. Waking up naturally with the sun is far better for our bodies than having to rely on alarm clocks to wake up in the dark, he said.

Herzog said Florida, where [Senator Marco] Rubio has championed the Sunlight Protection Act, is much less impacted by the negative impacts of daylight saving time because it's as far east and south as you can get in the U.S., while people in a state like Minnesota would have much more time in the dark in the morning.

The article also reminds U.S. readers that "No state can adopt permanent daylight saving time unless U.S. Congress passes a law to authorize it first." Nevertheless... Oklahoma became the most recent state to pass a measure authorizing permanent daylight saving time, pending Congressional approval, in April. Nineteen other states have passed laws or resolutions to move toward daylight saving time year-round, if Congress were ever to allow it, according to the National Conference of State Legislatures...

Only two states and some territories never have to set their clocks forward or backward... [Hawaii and Arizona, except for the Navajo Nation.]

IOS

Apple Intelligence Is Out Today (theverge.com) 36

An anonymous reader quotes a report from The Verge: Apple's AI features are finally starting to appear. Apple Intelligence is launching today on the iPhone, iPad, and Mac, offering features like generative AI-powered writing tools, notification summaries, and a cleanup tool to take distractions out of photos. It's Apple's first official step into the AI era, but it'll be far from its last. Apple Intelligence has been available in developer and public beta builds of Apple's operating systems for the past few months, but today marks the first time it'll be available in the full public OS releases. Even so, the features will still be marked as "beta," and Apple Intelligence will very much remain a work in progress. (You'll have to get on a waitlist to try Apple Intelligence, too.) Siri gets a new look, but its most consequential new features -- like the ability to take action in apps -- probably won't arrive until well into 2025.

In the meantime, Apple has released a very "AI starter kit" set of features. "Writing Tools" will help you summarize notes, change the tone of your messages to make them friendlier or more professional, and turn a wall of text into a list or table. You'll see AI summaries in notifications and emails, along with a new focus mode that aims to filter out unimportant alerts. The updated Siri is signified by a glowing border around the screen, and it now allows for text input by double-tapping the bottom of the screen. It's helpful stuff, but we've seen a lot of this before, and it'll hardly represent a seismic shift in how you use your iPhone. Apple says that more Apple Intelligence features will arrive in December. [...] Availability will expand in December to Australia, Canada, Ireland, New Zealand, South Africa, and the UK, with additional languages coming in April.
Despite Apple's previous claim that Apple Intelligence wouldn't be available in the European Union due to the Digital Markets Act, the features will, in fact, be coming to Europe in April of next year.

Further reading: Apple Updates the iMac With M4 Chip
Power

Singapore Approves 2,600-Mile Undersea Cable to Import Solar Energy from Australia (newatlas.com) 92

"The world's largest renewable energy and transmission project has received key approval from government officials," reports New Atlas.

Solar power from Australia will be carried 2,672 miles (4,300 kilometers) to Singapore over undersea cables in what's being called "the Australia-Asia Power Link project." Reuters reports that SunCable "aims to produce 6 gigawatts of electricity at a vast solar farm in Northern Australia and ship about a third of that to Singapore via undersea cable."

More from New Atlas: [The project] will start by constructing a mammoth solar farm in Australia's Northern Territory to transmit around-the-clock clean power to [the Australian city] Darwin, and also export "reliable, cost-competitive renewable energy" to Singapore... with a clean energy generation capacity of up to 10 gigawatts, plus utility scale onsite storage. [The recently-obtained environmental approval] also green lights an 800-km (~500-mile) overhead transmission line between the solar precinct and Murrumujuk near Darwin...

If all of the dominoes line up perfectly, supply of the first clean electricity is estimated to start in the early 2030s. An overview graphic on the project page shows that the eventual end game for the Powell Creek development appears to be the generation of up to 20 GW of peak solar power and have some 36-42 GWh of battery storage on site.

Thanks to long-time Slashdot reader AmiMoJo for sharing the news.
Power

Researchers Develop New Lithium Extraction Method With 'Nearly Double the Performance' (pv-magazine.com) 21

PV Magazine reports: Researchers in Australia and China have developed an innovative technology enabling direct lithium extraction from difficult-to-process sources like saltwater, which they say represents a substantial portion of the world's lithium potential.

Until now, up to 75% of the world's lithium-rich saltwater sources have remained untapped because of technical limitations, but given predictions that global lithium supply could fall short of demand as early as 2025, the researchers believe they have a game-changing solution. Their technology is a type of nanofiltration system that uses ethylenediaminetetraacetic acid, or EDTA, as a chelating agent to selectively separate lithium from other minerals, especially magnesium, which is often present in brines and difficult to remove.

"With some predicting global lithium supply could fall short of demand as early as 2025, the innovative technology sets a new standard in lithium processing," writes SciTechDaily: The work, co-led by Dr Zhikao Li, from the Monash Suzhou Research Institute and the Department of Chemical and Biological Engineering, and Professor Xiwang Zhang from the University of Queensland, promises to meet the surging demand for lithium and paves the way for more sustainable and efficient extraction practices... "Our technology achieves 90 percent lithium recovery, nearly double the performance of traditional methods, while dramatically reducing the time required for extraction from years to mere weeks," Dr. Li said.

The technology also turns leftover magnesium into a valuable, high-quality product that can be sold, reducing waste and its impact on the environment. Beyond its advanced efficiency, the EALNF system brings innovation to address major environmental concerns associated with lithium extraction. Unlike conventional methods that deplete vital water resources in arid regions, the technology produces freshwater as a by-product.

Dr Li said the system was flexible and ready for large-scale use, meaning it can quickly expand from testing to full industrial operations. "This breakthrough is crucial for avoiding a future lithium shortage, making it possible to access lithium from hard-to-reach sources and helping power the shift to clean energy."

"Our scalable process minimizes environmental impact while maximizing resource utilization," according to the researchers' article in Nature Sustainability, "thereby catalysing the shift toward a more sustainable future."

Thanks to long-time Slashdot reader schwit1 for sharing the news.
United Kingdom

UK Considers New Smartphone Bans for Children (wired.com) 30

The UK parliament is considering clamping down on how young people use smartphones. A bill brought forward by a Labour member of parliament proposes both banning phones in schools and raising the age at which children can consent to social media companies using their data. Wired: Calls for smartphone bans have been growing in the UK, driven by fears that the devices are driving a decline in kids' mental health and ability to focus. Smartphone Free Childhood, a prominent pressure group inspired by Jonathan Haidt's book The Anxious Generation, calls for parents to delay getting smartphones for their children until they are at least 13. Florida has already passed a law that bans under-14s from holding social media accounts, and Australia is considering similar restrictions.

But academics warn that smartphone and social media bans are unlikely to be a catch-all solution to the problems facing young people. Experts on the impact of digital technologies argue that the legislation could end up shutting children out from the potential benefits of smartphones, and that more pressure should be put on social media companies to design better digital worlds for children. The latest proposed clampdown in the UK is thin on details, but the MP bringing the bill, Josh MacAllister, told the radio show Today that it would prevent social media companies making use of young peoples' data until they are 16. "We can protect children from lots of the addictive bad design features that come from social media," he said. The bill would also make a ban on phones in schools legally binding.

United Kingdom

'Operating in the Stone Age': NHS Staff's Daily Struggle With Outdated Tech 113

The Financial Times: In the paediatric centre at one of London's largest hospitals, doctors are confounded each day by a ward computer that is not connected to a printer. The computer is used for managing the daily list of patients. Doctors can only access and update the list, using one shared account. So twice a day, two doctors on the ward said one of them had to log in to this computer, update the patient list, send the list to themselves via NHS email, and then log in to another nearby computer to print it off for the team. "I am at a top London hospital and yet at times I feel as though we are operating in the Stone Age," said one paediatrician on the ward.

Tackling the frustrating delays caused by outdated technology [Editor's note: non-paywalled link] is one of health secretary Wes Streeting and Prime Minister Sir Keir Starmer's core missions, having vowed to shift the service "from an analogue to a digital NHS." The monumental task of moving the world's largest publicly funded health service into the digital age is not lost on doctors working on the frontline of the NHS. While many sectors of the economy have been "radically reshaped" by technology in recent years, a landmark report into the state of the health service in England last month concluded that the NHS stood "in the foothills of digital transformation."

But doctors and nurses point out that the basic infrastructure needs to be brought up to a minimum standard, given significant regional variations between hospitals, before politicians extol the virtues of cutting-edge tech. "Some of us just want the printers to work," noted one NHS hospital doctor. "The complete flip-a-coin nature of how equipped your hospital is is mind-boggling," they added. "I have worked in hospitals that are at least 12 years behind others." A report published in 2022 by the British Medical Association, the UK's main doctors' union, estimated that doctors in England lost 13.5mn working hours a year as a consequence of "inadequate IT systems and equipment." One reason for the outdated infrastructure is that the country has spent almost $48bn less than its peers -- such as Germany, France, Australia -- on health assets since the 2010s, according to a government-commissioned study by Lord Ara Darzi last month.
Encryption

Encrypted Chat App 'Session' Leaves Australia After Visit From Police 87

Session, a small but increasingly popular encrypted messaging app, is moving its operations outside of Australia after the country's federal law enforcement agency visited an employee's residence and asked them questions about the app and a particular user. 404 Media reports: Now Session will be maintained by an entity in Switzerland. The move signals the increasing pressure on maintainers of encrypted messaging apps, both when it comes to governments seeking more data on app users, as well as targeting messaging app companies themselves, like the arrest of Telegram's CEO in August. "Ultimately, we were given the choice between remaining in Australia or relocating to a more privacy-friendly jurisdiction, such as Switzerland. For the project to continue, it could not be centred in Australia," Alex Linton, president of the newly formed Session Technology Foundation (STF) which will publish the Session app, told 404 Media in a statement. The app will still function in Australia, Linton added. Linton said that last year the Australian Federal Police (AFP) visited a Session employee at their home in the country. "There was no warrant used or meeting organised, they just went into their apartment complex and knocked on their front door," Linton said.

The AFP asked about the Session app and company, and the employee's history on the project, Linton added. The officers also asked about an ongoing investigation related to a specific Session user, he added. Linton showed 404 Media an email sent by Session's legal representatives to the AFP which reflected that series of events. Part of Session's frustration around the incident came from the AFP deciding to "visit an employee at home rather than arranging a meeting through our proper (publicly available) channels," Linton said.
Power

Arkansas May Have Vast Lithium Reserves, Researchers Say (nytimes.com) 86

Researchers at the United States Geological Survey and the Arkansas government announced on Monday that they had found a trove of lithium, a critical raw material for electric vehicle batteries, in an underground brine reservoir in Arkansas. From a report: With the help of water testing and machine learning, the researchers determined that there might be five million to 19 million tons of lithium -- more than enough to meet all of the world's demand for the metal -- in a geological area known as the Smackover Formation. Several companies, including Exxon Mobil, are developing projects in Arkansas to produce lithium, which is dissolved in underground brine.

Energy and mining companies have long produced oil, gas and other natural resources in the Smackover, which extends from Texas to Florida. And the federal and state researchers said lithium could be extracted from the waste stream of the brines from which companies extracted other forms of energy and elements. The energy industry, with the Biden administration's encouragement, has been increasingly working to produce the raw materials needed for the lithium-ion batteries in the United States. A few projects have started recently, and many more are in various stages of study and development across the country.

Most of the world's lithium is produced in Australia and South America. A large majority of it is then processed in China, which also dominates the manufacturing of electric vehicle batteries. "The potential for increased U.S. production to replace imports has implications for employment, manufacturing and supply chain resilience," David Applegate, the director of the United States Geological Survey, said in a statement announcing the study. "This study illustrates the value of science in addressing economically important issues."

Earth

Sustainable Building Effort Reaches New Heights With Wooden Skyscrapers (knowablemagazine.org) 128

The University of Toronto is constructing a 14-story building using mass timber, one of the largest and most recent projects to employ this innovative building technology. "Mass timber is an appealing alternative to energy-intensive concrete and steel, which together account for almost 15 percent of global carbon dioxide emissions," reports Knowable Magazine. "Though experts are still debating mass timber's role in fighting climate change, many are betting it's better for the environment than current approaches to construction. It relies on wood, after all, a renewable resource." From the report: Today, the tallest mass timber building is the 25-story Ascent skyscraper in Milwaukee, completed in 2022. As of that year, there were 84 mass timber buildings eight stories or higher either built or under construction worldwide, with another 55 proposed. Seventy percent of the existing and future buildings were in Europe, about 20 percent in North America and the rest in Australia and Asia, according to a report (PDF) from the Council on Tall Buildings and Urban Habitat. When you include smaller buildings, at least 1,700 mass timber buildings had been constructed in the United States alone as of 2023. [...]

In principle, mass timber is like plywood but on a much larger scale: The smaller pieces are layered and glued together under pressure in large specialized presses. Today, beams up to 50 meters long, usually made of what's called glue-laminated timber, or glulam, can replace steel elements. Panels up to 50 centimeters thick, typically cross-laminated timber, or CLT, replace concrete for walls and floors. These wood composites can be surprisingly strong -- stronger than steel by weight. But a mass timber element must be bulkier to achieve that same strength. As a building gets higher, the wooden supports must get thicker; at some point, they simply take up too much space. So for taller mass timber buildings, including the Ascent skyscraper, architects often turn to a combination of wood, steel and concrete.

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