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Face Masks are Inefficient to Resist Air Pollution

A man wears a face mask while taking a selfie in Beijing in 2015. Getty Images
A man wears a face mask while taking a selfie in Beijing in 2015. Getty Images
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Face Masks are Inefficient to Resist Air Pollution

A man wears a face mask while taking a selfie in Beijing in 2015. Getty Images
A man wears a face mask while taking a selfie in Beijing in 2015. Getty Images

Face masks available to consumers in China for protection against air pollution vary widely in their real-world performance, suggests a recent study.

Although a mask may filter tiny particles as advertised, researchers report in Occupational & Environmental Medicine said that face size and shape as well as movement can lead to leakage as high as 68 percent.

Senior study author Miranda Loh, an exposure and environmental scientist at the Institute of Occupational Medicine in Edinburgh, Scotland said: “Even if the filtration efficiency of the mask is high, and the mask fits the person initially, the mask may not continue to give a good fit as the person goes about their daily activities.”

“It is important for people to understand that not all masks are effective at reducing exposure to particles in air pollution. And none of these masks reduced the concentration of pollution gases such as nitrogen dioxide,” she added in an email.

The study team conducted an assessment of a sampling of masks in Beijing is part of a larger project funded by the Research Councils UK, examining air pollution in the Chinese capital and its health effects.

Air pollution causes an estimated 1.6 million premature deaths in China each year, the study team notes.

These tiny particles found in vehicle exhaust and industrial emissions and known as “PM2.5” can penetrate deep into the lungs, and from there, enter the bloodstream.

Tests made on nine different mask types showed that the average particle and carbon penetration ranged from 0.26 percent to 26 percent, depending on the mask material.

Richard Peltier of the University of Massachusetts, who wasn’t involved in the study, told Reuters Health by email: “Air pollution is a global problem that is important for not only Beijing, but also Boston and Barcelona.
Breathing pollutants, especially particulate matter, is very harmful, causing millions of early deaths across the world.”

“Future studies should recruit more volunteers, and focus on the main reasons why masks seem to fail - whether the material itself is faulty, the masks don’t fit different people well, or they don’t seem to work well for daily living conditions,” Peltier added.

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Varieties

‘Like Skiing’: First Urban Cable Car Unveiled Outside Paris

This photograph shows the first urban cable car "C1" in Ile-de-France region during its official launch, in between Creteil Pointe du Lac and Villeneuve-Saint-Georges, on the outskirts of Paris on December 13, 2025. (AFP)
This photograph shows the first urban cable car "C1" in Ile-de-France region during its official launch, in between Creteil Pointe du Lac and Villeneuve-Saint-Georges, on the outskirts of Paris on December 13, 2025. (AFP)
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‘Like Skiing’: First Urban Cable Car Unveiled Outside Paris

This photograph shows the first urban cable car "C1" in Ile-de-France region during its official launch, in between Creteil Pointe du Lac and Villeneuve-Saint-Georges, on the outskirts of Paris on December 13, 2025. (AFP)
This photograph shows the first urban cable car "C1" in Ile-de-France region during its official launch, in between Creteil Pointe du Lac and Villeneuve-Saint-Georges, on the outskirts of Paris on December 13, 2025. (AFP)

Gondolas floated above a cityscape in the southeastern suburbs of Paris on Saturday as officials unveiled the first urban cable car in the French capital's region.

Authorities inaugurated the C1 line in the suburb of Limeil-Brevannes in the presence of Valerie Pecresse, the head of the Ile-de-France region, and the mayors of the towns served by the cable car.

The 4.5-kilometer route connects Creteil to Villeneuve-Saint-Georges and passes through Limeil-Brevannes and Valenton.

Historically used to cross rugged mountain terrain, such systems are increasingly being used to link up isolated neighborhoods.

"It's like skiing!" joked Ibrahim Bamba, a 20-year-old student who lives in Limeil-Brevannes which is not served by the Paris metro or any rail network.

"It's the Alps on the Marne!" said Pecresse, referring to the department of Val-de-Marne located in the Grand Paris metropolis.

The cable car will carry some 11,000 passengers per day in its 105 gondolas, each able to accommodate ten passengers.

The total journey will take 18 minutes, including stops along the way, compared to around 40 minutes by bus or car, connecting the isolated neighborhoods to the Paris metro line 8. A ride requires a bus ticket or travel pass used for the Paris metro.

"This is a great step forward in terms of transportation. The roads are often congested in the morning," said Salimatou Bah, 52, who has lived in Limeil-Brevannes for thirteen years.

"We wondered if people would be hesitant, but I think it just takes a little time to adapt."

- 'Urban divides' -

Pecresse said the project was the result of "a 10-year obstacle course."

"We had to find the funding, convince local residents," she said. "For the inhabitants of Val-de-Marne, it's a sign of consideration."

The 138-million-euro project was cheaper to build than a subway, officials said.

"An underground metro would never have seen the light of day because the budget of more than billion euros could never have been financed," said Gregoire de Lasteyrie, vice-president of the Ile-de-France regional council in charge of transport.

Each cabin can accommodate ten seated passengers as well as wheelchairs, bicycles, and strollers. Inside, video surveillance and emergency call buttons have been installed to ensure passenger safety in addition to staff at each station.

The cable car is a response to "urban divides" in neighborhoods that were "lacking in terms of public transport," said Metin Yavuz, mayor of Valenton, a town of 16,000 inhabitants.

It is France's seventh urban cable car, with aerial tramways already operating in cities including Brest, Saint-Denis de La Reunion and Toulouse.

France's first urban cable car was built in Grenoble, nestled at the foot of the Alps, in 1934. The iconic "bubbles" have become one of the symbols of the southeastern city.

Cable cars are considered one of the safest means of transport in the world.

In France, the last fatal accident occurred in 1999 in the Hautes-Alpes, when 20 people lost their lives.

Varieties

Before Megalodon, Researchers Say a Monstrous Shark Ruled Ancient Australian Seas

A illustration made in Sept. 3, 2025, of a gigantic 8 meter (26 foot) long mega-predatory lamniform shark swimming beside a long-necked plesiosaur in the seas off Australia 115 million years ago. (Pollyanna von Knorring/Swedish Museum of Natural History via AP)
A illustration made in Sept. 3, 2025, of a gigantic 8 meter (26 foot) long mega-predatory lamniform shark swimming beside a long-necked plesiosaur in the seas off Australia 115 million years ago. (Pollyanna von Knorring/Swedish Museum of Natural History via AP)
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Before Megalodon, Researchers Say a Monstrous Shark Ruled Ancient Australian Seas

A illustration made in Sept. 3, 2025, of a gigantic 8 meter (26 foot) long mega-predatory lamniform shark swimming beside a long-necked plesiosaur in the seas off Australia 115 million years ago. (Pollyanna von Knorring/Swedish Museum of Natural History via AP)
A illustration made in Sept. 3, 2025, of a gigantic 8 meter (26 foot) long mega-predatory lamniform shark swimming beside a long-necked plesiosaur in the seas off Australia 115 million years ago. (Pollyanna von Knorring/Swedish Museum of Natural History via AP)

In the age of dinosaurs — before whales, great whites or the bus-sized megalodon — a monstrous shark prowled the waters off what's now northern Australia, among the sea monsters of the Cretaceous period.

Researchers studying huge vertebrae discovered on a beach near the city of Darwin say the creature is now the earliest known mega-predator of the modern shark lineage, living 15 million years earlier than enormous sharks found before.

And it was huge. The ancestor of today’s 6-meter (20-foot) great white shark was thought to be about 8 meters (26 feet) long, the authors of a paper published in the journal Communications Biology said.

“Cardabiodontids were ancient, mega-predatory sharks that are very, very common from the later part of the Cretaceous, after 100 million years ago,” said Benjamin Kear, the senior curator in paleobiology at the Swedish Museum of Natural History and one of the study’s authors. “But this has pushed the time envelope back of when we’re going to find absolutely enormous cardabiodontids.”

Sharks have a 400-million-year history but lamniforms, the ancestors of today’s great white sharks, appear in the fossil record from 135 million years ago. At that time they were small — probably only a meter in length — which made the discovery that lamniforms had already become gigantic by 115 million years ago an unexpected one for researchers.

The vertebrae were found on coastline near Darwin in Australia’s far north, once mud from the floor of an ancient ocean that stretched from Gondwana — now Australia — to Laurasia, which is now Europe. It’s a region rich in fossil evidence of prehistoric marine life, with long-necked plesiosaurs and ichthyosaurs among the creatures discovered so far.

The five vertebrae that launched the quest to estimate the size of their mega-shark owners were not a recent discovery, but an older one that had been somewhat overlooked, Kear said. Unearthed in the late 1980s and 1990s, the fossils measured 12 centimeters (4.7 inches) across and had been stored in a museum for years.

When studying ancient sharks, vertebrae are prizes for paleontologists. Shark skeletons are made of cartilage, not bone, and their fossil record is mostly made up of teeth, which sharks shed throughout their lives.

“The importance of vertebrae is they give us hints about size,” Kear said. “If you’re trying to scale it from teeth, it’s difficult. Are the teeth big and the bodies small? Are they big teeth with big bodies?”

Scientists have used mathematical formulas to estimate the size of extinct sharks like megalodon, a massive predator that came later and may have reached 17 meters (56 feet) in length, Kear said. But the rarity of vertebrae mean questions of ancient shark size are difficult to answer, he added.

The international research team spent years testing different ways to estimate the size of the Darwin cardabiodontids, using fisheries data, CT scans and mathematical models, Kear said. Eventually, they arrived at a likely portrait of the predator’s size and shape.

“It would’ve looked for all the world like a modern, gigantic shark, because this is the beauty of it,” Kear said. “This is a body model that has worked for 115 million years, like an evolutionary success story.”

The study of the Darwin sharks suggested that modern sharks rose early in their adaptive evolution to the top of prehistoric food chains, the researchers said. Now, scientists could scour similar environments worldwide for others, Kear said.

“They must have been around before,” he said. “This thing had ancestors.”

Studying ancient ecosystems like this one could help researchers understand how today’s species might respond to environmental change, Kear added.

“This is where our modern world begins,” he said. “By looking at what happened during past shifts in climate and biodiversity, we can get a better sense of what might come next.”

Varieties

Move over Larry: Maximus the PM's Cat Grabs Belgium Spotlight

Larry the Downing Street cat is a global celebrity in his own right, with more than 900,000 followers on X. JUSTIN TALLIS / AFP/File
Larry the Downing Street cat is a global celebrity in his own right, with more than 900,000 followers on X. JUSTIN TALLIS / AFP/File
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Move over Larry: Maximus the PM's Cat Grabs Belgium Spotlight

Larry the Downing Street cat is a global celebrity in his own right, with more than 900,000 followers on X. JUSTIN TALLIS / AFP/File
Larry the Downing Street cat is a global celebrity in his own right, with more than 900,000 followers on X. JUSTIN TALLIS / AFP/File

It is no secret that a tabby named Larry wields considerable power in Downing Street. Now in Belgium, a rescue cat named Maximus has shot to social media stardom as bewhiskered sidekick and PR weapon of Prime Minister Bart De Wever.

Taken in from a shelter by the Flemish conservative leader over the summer, the grey fluffball has become a fixture on Instagram -- snapped batting at string or lolling around in the boss's office.

But while Larry has risen above politics as Chief Mouser to six British prime ministers, the adventures of De Wever's four-legged friend come with a dose of salty commentary on Belgium's turbulent public life, said AFP.

Cartoon bubbles have captured Maximus musing sardonically -- in Flemish -- on everything from the country's long-running budget showdown to strikes over his boss's austerity measures, or a new voluntary military service for young Belgians.

'Maximus, can you catch a drone?'

Less than six months after his account went live in July, Maximus has caught up with his master when it comes to Instagram followers.

The account name -- @maximustp16 -- stands for "Maximus Textoris Pulcher", a cryptic reference to that of his boss, which means "The Weaver" in Dutch.

Those in the know say the fel-influencer's posts are put up by the prime minister's personal assistant.

But the Belgian leader -- known for his deadpan sense of humor -- is also pretty prolific online, and regularly cross-posts with the cat's account when he wants to strike a lighter note.

Since taking office in February, De Wever has posted a whole series of vignettes of himself with Maximus, pushing him in a stroller or taking a nap by his side.

His first response in October to the news of a foiled plot to attack him using drone-mounted explosives?

A post showing the prime minister and reclining cat with the cartoon caption "Maximus, can you catch a drone?"

"No -- but I'm catching dreams like no one else!" the mog replies.

'Noise and hot air'

All good fun, but what is the strategy at work?

For political analyst Dave Sinardet the spoof account is chiefly a way for the 54-year-old De Wever to freshen up his public image -- and show he does not take himself too seriously.

"It's a smart way to do political PR," said Sinardet, a university professor in Brussels. "It makes politicians seem friendlier, gentler -- considering that most people see them as rational, even arrogant figures."

The Flemish nationalist faces an uphill challenge -- under fire from left-wing parties who accuse him of unpicking social protections with rolling strikes and protests targeting his government all year.

Deploying pets as political PR assets is nothing new: every US president in history, with the exception of Donald Trump, has posed with animals at the White House.

Larry the Downing Street cat is a global celebrity in his own right, with his @Number10cat account on X boasting almost 900,000 followers.

But De Wever's posts with Maximus are not to everyone's liking at home.

A video of the prime minister pretending to play "Amazing Grace" on the bagpipes -- the pipe being Maximus's tail -- during tense budget talks had the opposition hissing.

"Quite the summary of their politics: noise and hot air," snapped the socialist lawmaker Patrick Prevot.