Paul Voosen reports via Science Magazine: Few things prompt as much anxiety in science and the wider world as the growing use of artificial intelligence (AI) and the rising influence of China. This spring, these two factors created a rift at the European Geosciences Union (EGU), one of the world's largest geoscience societies, that led to the firing of its president. The whole episode has been "a packaging up of fear of AI and fear of China," says Michael Stephenson, former chief geologist of the United Kingdom and one of the founders of Deep-time Digital Earth (DDE), a $70 million effort to connect digital geoscience databases. In 2019, another geoscience society, the International Union of Geological Sciences (IUGS), kicked off DDE, which has been funded almost entirely by the government of China's Jiangsu province.

The dispute pivots on GeoGPT, an AI-powered chatbot that is one of DDE's main efforts. It is being developed by Jian Wang, chief technology officer of e-commerce giant Alibaba. Built on Qwen, Alibaba's own chatbot, and fine-tuned on billions of words from open-source geology studies and data sets, GeoGPT is meant to provide expert answers to questions, summarize documents, and create visualizations. Stephenson tested an early version, asking it about the challenges of using the fossilized teeth of conodonts, an ancient relative of fish, to define the start of the Permian period 299 million years ago. "It was very good at that," he says. As awareness of GeoGPT spread, so did concern. Paul Cleverly, a visiting professor at Robert Gordon University, gained access to an early version and said in a recent editorial in Geoscientist there were "serious issues around a lack of transparency, state censorship, and potential copyright infringement." Paul Cleverly and GeoScienceWorld CEO Phoebe McMellon raised these concerns in a letter to IUGS, arguing that the chatbot was built using unlicensed literature without proper citations. However, they did not cite specific copyright violations, so DDE President Chengshan Wang, a geologist at the China University of Geosciences, decided not to end the project.

Tensions at EGU escalated when a complaint about GeoGPT's transparency was submitted before the EGU's April meeting, where GeoGPT would be introduced. "It arrived at an EGU whose leadership was already under strain," notes Science. The complaint exacerbated existing leadership issues within EGU, particularly surrounding President Irina Artemieva, who was seen as problematic by some executives due to her affiliations and actions. Science notes that she's "affiliated with Germany's GEOMAR Helmholtz Centre for Ocean Research Kiel but is also paid by the Chinese Academy of Geological Sciences to advise it on its geophysical research."

Artemieva forwarded the complaint via email to the DDE President to get his view, but forgot to delete the name attached to it, leading to a breach of confidentiality. This incident, among other leadership disputes, culminated in her dismissal and the elevation of Peter van der Beek to president. During the DDE session at the EGU meeting, van der Beek's enforcement actions against Chinese scientists and session attendees led to allegations of "harassment and discrimination."

"Seeking to broker a peace deal around GeoGPT," IUGS's president and another former EGU president, John Ludden, organized a workshop and invited all parties to discuss GeoGPT's governance, ongoing negotiations for licensing deals and alternative AI models for GeoGPT's use.

Scientists in China have found a species of moss that is able to withstand Mars-like conditions. The species is called Syntrichia caninervis and it's found in regions including Antarctica and the Mojave desert. The Guardian reports: "The unique insights obtained in our study lay the foundation for outer space colonization using naturally selected plants adapted to extreme stress conditions," the team write. [...] Writing in the journal The Innovation, researchers in China describe how the desert moss not only survived but rapidly recovered from almost complete dehydration. It was also able to regenerate under normal growth conditions after spending up to five years at -80C and up to 30 days at -196C, and after exposure to gamma rays, with doses of around 500Gy even promoting new growth.

The team then created a set-up that had similar pressures, temperatures, gases and UV radiation to Mars. It found the moss survived in this Mars-like environment, and was able to regenerate under normal growth conditions, even after seven days of exposure. The team also noted plants that were dried before such exposure faired better. "Looking to the future, we expect that this promising moss could be brought to Mars or the moon to further test the possibility of plant colonization and growth in outer space," the researchers write.

China's Ministry of Industry and Information Technology has announced plans to develop standards for brain-computer interface technology, signaling the country's intent to advance in this emerging field. The ministry said it would assemble a committee of experts from various sectors to draft guidelines for brain information encoding and decoding, data communication, and visualization.

Brain-computer interface technology, which enables direct communication between the brain and external devices, has gained prominence with ventures like Elon Musk's Neuralink in the United States. China's move suggests a shift from primarily academic research to more focused development, potentially rivaling Western competitors. Previous Chinese brain-computer interface efforts have been largely confined to university research. In March, state media reported a paralyzed patient regaining some mobility after receiving a brain implant developed by Tsinghua University.

Microsoft revealed that the Russian hackers who breached its systems earlier this year stole more emails than initially reported. "We are continuing notifications to customers who corresponded with Microsoft corporate email accounts that were exfiltrated by the Midnight Blizzard threat actor, and we are providing the customers the email correspondence that was accessed by this actor," a Microsoft spokesperson told Bloomberg (paywalled). "This is increased detail for customers who have already been notified and also includes new notifications." The Register reports: We've been aware for some time that the digital Russian break-in at the Windows maker saw Kremlin spies make off with source code, executive emails, and sensitive U.S. government data. Reports last week revealed that the issue was even larger than initially believed and additional customers' data has been stolen. Along with Russia, Microsoft was also compromised by state actors from China not long ago, and that issue similarly led to the theft of emails and other data belonging to senior U.S. government officials.

Both incidents have led experts to call Microsoft a threat to U.S. national security, and president Brad Smith to issue a less-than-reassuring mea culpa to Congress. All the while, the U.S. government has actually invested more in its Microsoft kit. Bloomberg reported that emails being sent to affected Microsoft customers include a link to a secure environment where customers can visit a site to review messages Microsoft identified as having been compromised. But even that might not have been the most security-conscious way to notify folks: Several thought they were being phished.

Commercial space efforts continue around the world, as the Chinese company Space Pioneer fired up a partially-fueled rocket engine Sunday for a short-duration test of its reusable rocket on the ground. But Space News reports that the test "ended in catastrophic failure and a dramatic explosion."

"Amateur footage captured by Gongyi citizens and posted on Chinese social media shows the nine-engine test stage igntiing and then, exceptionally, taking off." Hold-down clamps and other structures are typically used to securely keep stages in place. The stage is seen climbing into the sky before halting, apparently with its engines shutting off, and returning to Earth. The stage impacted the ground around 50 seconds after it took off, apparently with much of its kerosene-liquid oxygen propellant remaining, causing a large explosion.

The Tianlong-3 first stage would likely fire for a number of minutes on an orbital flight. Space Pioneer was conducting its test as a buildup to an orbital launch of the Tianlong-3, which is benchmarked against the SpaceX Falcon 9, in the coming months. The company announced earlier this month that it has secured $207 million in new funding.

Shanghai-based digital newspaper The Paper reported Henan officials as saying there were no casualties reported. Space Pioneer issued its own statement later, stating there was a structural failure at the connection between the rocket body and the test bench. The rocket's onboard computer automatically shut down the engines and the rocket fell 1.5 kilometers southwest. It reiterated earlier reports that no casualties were found. The company said the test produced 820 tons of thrust.
The article speculates on whether the event will delay the development of the rocket — or the planned launches for a Chinese megaconstellation of satellites. "Space Pioneer says it will conduct an analysis and restart testing with new hardware as soon as possible."

After launching in the United States earlier this year, Apple's Vision Pro is now available to buy in China, Japan, and Singapore. "The Apple Vision Pro will also roll out to Germany, France, Australia, the UK, and Canada on July 12th, with preorders for those regions available starting today at 5AM PT," notes The Verge. Apple is documenting the international launch via a recent blog post.

According to CNBC, the device starts at $4,128 (29,999 yuan) in China, compared to $3,500 in the U.S. Meanwhile, Apple is already hard at work on a more budget-friendly model. In Bloomberg's "Power On" newsletter, Apple news-breaker Mark Gurman reports today that the tech giant is "working on a cheaper headset, a second Vision Pro model and augmented-reality glasses to better compete with Meta."

According to Interpol, nearly 4,000 people around the world have been arrested for a variety of online crimes, with $257 million in assets seized. The Record reports: The operation, dubbed First Light, was conducted by police officers from 61 countries and targeted phishing, investment fraud, fake online shopping sites, romance scams, and impersonation scams, according to a statement by Interpol. In addition to arresting thousands of potential cybercriminals, the police also identified over 14,600 other possible suspects across all continents.

During the searches, law enforcement seized suspects' real estate, high-end vehicles, expensive jewelry, and many other high-value items and collections. They also froze 6,745 bank accounts used for transferring money obtained through illegal operations. In one case, the police intercepted $331,000 gleaned from a business email compromise fraud involving a Spanish victim who unknowingly transferred money to someone in Hong Kong. In another case, authorities in Australia successfully recovered $3.7 million on behalf of an impersonation scam victim after the funds were fraudulently transferred to bank accounts in Malaysia and Hong Kong.

The criminal networks identified during the operation were spread around the globe. In Namibia, for example, the police rescued 88 local youths who were forced into conducting scams as part of a sophisticated international crime network, according to Interpol. Law enforcement from Singapore, Hong Kong, and China prevented an attempted tech support scam, saving a 70-year-old victim from losing $281,200 worth of savings.

Fujifilm's X100 digital camera, once a niche product, has become an unexpected cash cow, driven by surging demand from young social media users. The retro-styled $1,599 camera has boosted Fujifilm's imaging division to its biggest profit contributor, accounting for 37% of operating profit in fiscal 2023, up from 27% the previous year.

Despite doubling production in China for the latest model, Fujifilm struggles to meet demand. The camera's popularity on platforms like TikTok has transformed it into a coveted accessory. The surge marks an unexpected reversal for Fujifilm, which had pivoted towards healthcare after the decline of traditional film photography.

An anonymous reader quotes a report from Ars Technica: Temu -- the Chinese shopping app that has rapidly grown so popular in the US that even Amazon is reportedly trying to copy it -- is "dangerous malware" that's secretly monetizing a broad swath of unauthorized user data, Arkansas Attorney General Tim Griffin alleged in a lawsuit (PDF) filed Tuesday. Griffin cited research and media reports exposing Temu's allegedly nefarious design, which "purposely" allows Temu to "gain unrestricted access to a user's phone operating system, including, but not limited to, a user's camera, specific location, contacts, text messages, documents, and other applications."

"Temu is designed to make this expansive access undetected, even by sophisticated users," Griffin's complaint said. "Once installed, Temu can recompile itself and change properties, including overriding the data privacy settings users believe they have in place." Griffin fears that Temu is capable of accessing virtually all data on a person's phone, exposing both users and non-users to extreme privacy and security risks. It appears that anyone texting or emailing someone with the shopping app installed risks Temu accessing private data, Griffin's suit claimed, which Temu then allegedly monetizes by selling it to third parties, "profiting at the direct expense" of users' privacy rights. "Compounding" risks is the possibility that Temu's Chinese owners, PDD Holdings, are legally obligated to share data with the Chinese government, the lawsuit said, due to Chinese "laws that mandate secret cooperation with China's intelligence apparatus regardless of any data protection guarantees existing in the United States."

Griffin's suit cited an extensive forensic investigation into Temu by Grizzly Research -- which analyzes publicly traded companies to inform investors -- last September. In their report, Grizzly Research alleged that PDD Holdings is a "fraudulent company" and that "Temu is cleverly hidden spyware that poses an urgent security threat to United States national interests." As Griffin sees it, Temu baits users with misleading promises of discounted, quality goods, angling to get access to as much user data as possible by adding addictive features that keep users logged in, like spinning a wheel for deals. Meanwhile hundreds of complaints to the Better Business Bureau showed that Temu's goods are actually low-quality, Griffin alleged, apparently supporting his claim that Temu's end goal isn't to be the world's biggest shopping platform but to steal data. Investigators agreed, the lawsuit said, concluding "we strongly suspect that Temu is already, or intends to, illegally sell stolen data from Western country customers to sustain a business model that is otherwise doomed for failure." Seeking an injunction to stop Temu from allegedly spying on users, Griffin is hoping a jury will find that Temu's alleged practices violated the Arkansas Deceptive Trade Practices Act (ADTPA) and the Arkansas Personal Information Protection Act. If Temu loses, it could be on the hook for $10,000 per violation of the ADTPA and ordered to disgorge profits from data sales and deceptive sales on the app. In a statement to Ars, a Temu spokesperson discredited Grizzly Research's investigation and said that the company was "surprised and disappointed by the Arkansas Attorney General's Office for filing the lawsuit without any independent fact-finding."

"The allegations in the lawsuit are based on misinformation circulated online, primarily from a short-seller, and are totally unfounded," Temu's spokesperson said. "We categorically deny the allegations and will vigorously defend ourselves."

"We understand that as a new company with an innovative supply chain model, some may misunderstand us at first glance and not welcome us. We are committed to the long-term and believe that scrutiny will ultimately benefit our development. We are confident that our actions and contributions to the community will speak for themselves over time." Last year, Temu was the most downloaded app in the U.S. and has only become more popular as reports of security and privacy risks have come out.

The US Conference of Mayors, which speaks for the administrations of more than 1,400 cities with a population of at least 30,000 people, adopted a resolution over the weekend at its annual meeting that voiced an objection to HR 3557, a draft law known as the American Broadband Deployment Act of 2023. From a report: The bill, which was introduced by House Rep Earl Carter (R-GA) last May and is awaiting further consideration by Congress, is ostensibly designed to make it easier for telcos to build infrastructure and run additional cables on state and locally managed land, ideally allowing fast broadband connectivity to reach more and more folks.

Rep Carter went as far as saying his proposals will ensure "more Americans have access to internet and the United States can maintain its competitive edge against China." Meanwhile, the mayors say HR 3557 strips local governments of authority to oppose bad projects. What raises particular ire are provisions in the draft law that would provide a very short window for opposition. What we have here, basically, is a classic example of one side trying to strip away what is perceived to be bureaucracy and red tape, and the other side insisting that checks and balances are sorely needed.

Chinese undersea cable manufacturers are experiencing growth despite U.S. trade restrictions, as Beijing pushes for self-sufficiency in critical communications infrastructure, Nikkei is reporting. FiberHome International Technologies, blacklisted by the U.S. in 2020, reports increased business due to China's drive for domestic production. "We don't need foreign technologies," a FiberHome executive told Nikkei.

China is challenging U.S. dominance in the global undersea cable network, which spans 1.4 million kilometers and carries over 95% of the world's data. Chinese companies are expected to contribute 45% of new cable installations from 2023 to 2028, according to industry estimates. The Asia-Pacific region leads in subsea cable investment, with China spearheading multiple projects connecting to Southeast Asian nations. This aligns with President Xi Jinping's "Digital Silk Road" initiative, part of the broader Belt and Road strategy. However, geopolitical tensions have led to project delays and increased costs. Some cables are being rerouted to avoid contentious areas like the South China Sea, potentially creating parallel networks divided along geopolitical lines.

ChatGPT developer OpenAI has sent out emails to users based in countries it considers "unsupported," saying it will block their access for good starting July 9. From a report: The email, reproduced on the OpenAI community forum here, includes a brief statement. "Our data shows that your organization has API traffic from a region that OpenAI does not currently support," it reads. "We will be taking additional measures to block API traffic from regions that are not on our supported countries and territories list starting on July 9."

"To continue using OpenAI's services, you will need to access the service in a supported region," it concludes. Much of the world has access to OpenAI including virtually the entire West, most of Eastern Europe, South Asia, and about half of Africa. However, there are some notable absences on the list such as Russia, Iran, Saudi Arabia, and mainland China.

China brought a capsule full of lunar soil [non-paywalled link] from the far side of the moon down to Earth on Tuesday, achieving the latest success in an ambitious schedule to explore the moon and other parts of the solar system. From a report: The sample, retrieved by the China National Space Administration's Chang'e-6 lander after a 53-day mission, highlights China's growing capabilities in space and notches another win in a series of lunar missions that started in 2007 and have so far been executed almost without flaw. "Chang'e-6 is the first mission in human history to return samples from the far side of the moon," Long Xiao, a planetary geologist at China University of Geosciences, wrote in an email. "This is a major event for scientists worldwide," he added, and "a cause for celebration for all humanity."

Such sentiments and the prospects of international lunar sample exchanges highlighted the hope that China's robotic missions to the moon and Mars will serve to advance scientific understanding of the solar system. Those possibilities are contrasted by views in Washington and elsewhere that Tuesday's achievement is the latest milestone in a 21st-century space race with geopolitical overtones. In February, a privately operated American spacecraft landed on the moon. NASA is also pursuing the Artemis campaign to return Americans to the lunar surface, although its next mission, a flight by astronauts around the moon, has been delayed because of technical issues. China, too, is looking to expand its presence on the moon, landing more robots there, and eventually human astronauts, in the years to come.

The Biden administration is investigating China Mobile, China Telecom and China Unicom over concerns the firms could exploit access to American data through their U.S. cloud and internet businesses by providing it to Beijing, Reuters reported Tuesday, citing sources familiar with the matter. From the report: The companies still have a small presence in the United States, for example, providing cloud services and routing wholesale U.S. internet traffic. That gives them access to Americans' data even after telecom regulators barred them from providing telephone and retail internet services in the United States.

Reuters found no evidence the companies intentionally provided sensitive U.S. data to the Chinese government or committed any other type of wrongdoing. The investigation is the latest effort by Washington to prevent Beijing from exploiting Chinese firms' access to U.S. data to harm companies, Americans or national security, as part of a deepening tech war between the geopolitical rivals. It shows the administration is trying to shut down all remaining avenues for Chinese companies already targeted by Washington to obtain U.S. data.

Passant Rabie reports via Gizmodo: A video circulating online appears to show debris from a Chinese rocket falling above a populated area, with residents running for cover as a heavy cloud of dark yellow smoke trails across the sky in a frightening scene. The suspected debris may have come from China's Long March 2C rocket, which launched on Saturday, June 22, carrying a joint mission by China and France to study Gamma-ray bursts. The launch was declared a success, but its aftermath was captured by videos posted to Chinese social media sites.

The videos show what appears to be the first stage rocket booster of the Long March 2C rocket tumbling uncontrollably over a village in southwest China, while local residents cover their ears and run for shelter from the falling debris. There are no reports of injuries or damage to property. That said, unverified video and images show a gigantic cloud erupting at the site of the crashed rocket, and the booster itself seemingly next to a roadway. The first stage of the rocket can be seen leaking fuel, the color of which is consistent with nitrogen tetroxide. The chemical compound is a strong oxidizing agent that is used for rocket propulsion but it can be fatally toxic, according to Jonathan McDowell, astrophysicist at the Harvard-Smithsonian Center.

"It's known in the rocket industry as BFRC, a big fucking red cloud," McDowell told Gizmodo. "And when you see a BFRC, you run for your life." Nitrogen tetroxide was accepted as the rocket propellant oxidizer of choice in the early 1950s by the U.S.S.R. and the United States, however it became less commonly used over the years because it is extremely toxic, according to NASA (PDF). If it comes in contact with skin, eyes, or respiratory system, it can destroy human tissue, and if inhaled through the lungs, it can lead to a build up of fluids or, in extreme cases, death. "It's pretty scary, but this is just how the Chinese do business," McDowell told Gizmodo. "They have a different level of acceptable public risk." "I think over a 10 year period, we may see the older rockets phased out but they're not in any hurry to do so," added McDowell. "They're still launching one a week or something like that, and they are really quite dangerous."

Top officials from the European Union and China agreed to negotiate a planned series of import taxes on Chinese electric vehicles. "The call marks the first time the two sides have agreed to negotiate since the EU threatened China with electric vehicle (EV) tariffs of up to 38%," reports the BBC. From the report: The EU said Chinese EVs were unfairly subsidised by its government. In response, China accused the EU of protectionism and trade rule breaches. An EU spokesperson told the BBC the call between Trade Commissioner Valdis Dombrovskis and his Chinese counterpart Wang Wentao was "candid and constructive." They said the two sides would "continue to engage at all levels in the coming weeks." However, the spokesperson also doubled down on the EU's opposition to how the Chinese EV industry is funded. They said "any negotiated outcome" to the proposed tariffs must address the "injurious subsidisation" of Chinese EVs.

China released a similar statement on Saturday and made clear it still disagreed with the EU. As well as its call with the EU, Mr Wang met German Vice-Chancellor and Federal Minister for Economic Affairs and Climate Action Robert Habeck on Saturday. In a Facebook post about the meeting, China's Ministry of Commerce said it had told Mr Habeck about its "firm opposition" to the tariffs. It repeated its threat to file a lawsuit with the World Trade Organization (WTO) "to firmly defend its legitimate rights and interests."

Germany has also expressed criticism of the tariffs. When the EU first proposed them last week following its investigation of Chinese EVs in the trading bloc, Germany's Transport Minister, Volker Wissing, said the move risked a "trade war" with Beijing. "The European Commission's punitive tariffs hit German companies and their top products," he wrote on X, formerly known as Twitter, at the time. The European car industry has been critical too. Stellantis - which owns Citroen, Peugeot, Vauxhall, Fiat, and several other brands - said it did not support measures that "contribute to the world fragmentation [of trade]."

JD.com founder Richard Liu warned employees against prioritizing work-life balance during a recent video conference, stating those who "put life first and work second" were not welcome at the company. This stance reflects a broader trend in China's tech sector as executives face slowing growth and increased competition.

Major tech firms, including Alibaba and Tencent, have cut tens of thousands of jobs since 2021. Companies are now seeking younger, cheaper workers and demanding longer hours from existing staff. Pinduoduo, an e-commerce group known for its high productivity and grueling work culture, is seen as a model by some in the industry. In 2021, two Pinduoduo employees died in incidents linked to overwork by colleagues.

Older tech professionals, typically over 35, face the greatest risk of redundancy and struggle to find new positions. Employers often view them as expensive and less flexible due to family responsibilities. A 2023 survey of 2,200 professionals in China's largest cities revealed widespread anxiety about career prospects and work-life balance. Many in the industry report experiencing depression and high stress levels.

"A Chinese launch of the joint Sino-French SVOM mission to study Gamma-ray bursts early Saturday saw toxic rocket debris fall over a populated area..." writes Space News: SVOM is a collaboration between the China National Space Administration (CNSA) and France's Centre national d'études spatiales (CNES). The mission will look for high-energy electromagnetic radiation from these events in the X-ray and gamma-ray ranges using two French and two Chinese-developed science payloads... Studying gamma-ray bursts, thought to be caused by the death of massive stars or collisions between stars, could provide answers to key questions in astrophysics. This includes the death of stars and the creation of black holes.

However the launch of SVOM also created an explosion of its own closer to home.A video posted on Chinese social media site Sina Weibo appears to show a rocket booster falling on a populated area with people running for cover. The booster fell to Earth near Guiding County, Qiandongnan Prefecture in Guizhou province, according to another post...

A number of comments on the video noted the danger posed by the hypergolic propellant from the Long March rocket... The Long March 2C uses a toxic, hypergolic mix of nitrogen tetroxide and unsymmetrical dimethylhydrazine (UDMH). Reddish-brown gas or smoke from the booster could be indicative of nitrogen tetroxide, while a yellowish gas could be caused by hydrazine fuel mixing with air. Contact with either remaining fuel or oxidizer from the rocket stage could be very harmful to individuals.
"Falling rocket debris is a common issue with China's launches from its three inland launch sites..." the article points out.

"Authorities are understood to issue warnings and evacuation notices for areas calculated to be at risk from launch debris, reducing the risk of injuries.

sonlas writes: Germany's energy transition plan includes extensive interconnection projects to distribute its intermittent renewable energy production. However, these projects face significant challenges. The latest example is Sweden. One such project, Hansa PowerBridge, announced in 2017, intended to link Germany and Sweden via a 300 km HVDC line through the Baltic Sea. This 700 MW project, estimated at 600 million euro, aimed to stabilize Germany's volatile electricity prices. However, on June 14, 2024, Sweden rejected the project, citing incompatibility between the countries' electricity systems. The connection would link northern Germany to southern Sweden, an area with insufficient infrastructure. Concerns also arose about the volatile German market disrupting Sweden's and increasing local prices. Energy Minister Ebba Busch justified this decision by saying the German market is currently not efficient enough and a connection would risk leading to higher prices and a more unstable electricity market in southern Sweden.

This highlights the difficulty Germany faces with its Energiewende, or energy transition model. This model leads to erratic electricity price behaviors and significant challenges in balancing production capacities. While a possible solution for Germany lies in interconnection with neighboring countries, the examples of Norway (which cancelled the NorGer project too) and Sweden show that from the perspective of these neighbors, it looks more like an "export of German problems" rather than a solution.

An anonymous reader shares a report: Punishing heat waves gripped three continents on Tuesday, breaking records in cities around the Northern Hemisphere less than two weeks after the Earth recorded what scientists said were likely its hottest days in modern history. Firefighters in Greece scrambled to put out wildfires, as parched conditions raised the risk of more blazes throughout Europe. Beijing logged another day of 95-degree heat, and people in Hangzhou, another Chinese city, compared the choking conditions to a sauna. From the Middle East to the American Southwest, delivery drivers, airport workers and construction crews labored under blistering skies. Those who could stay indoors did.

The temperatures, afflicting so much of the world all at once, were a withering reminder that climate change is a global crisis, driven by human-made forces: the emissions of heat-trapping gases, mainly caused by the burning of fossil fuels. John Kerry, the U.S. special envoy for climate change, sought to coordinate some of the global response with the Chinese premier in Beijing, as a heat wave clutched a huge swath of China. "The world really is looking to us for that leadership, particularly on the climate issue," Mr. Kerry told Chinese officials. "Climate, as you know, is a global issue, not a bilateral issue. It's a threat to all of humankind."

The planet has warmed about 2 degrees Fahrenheit since the 19th century and will continue to grow hotter until humans essentially stop burning coal, oil and gas, scientists say. The warmer temperatures contribute to extreme weather events and help make periods of extreme heat more frequent, longer and more intense. Also affecting this year's conditions is the return of El Nino, a cyclical weather pattern that, depending on the sea surface temperature and the pressure of the air above it, can originate in the Pacific and have wide-ranging effects on weather around the world.