2 . Fountains of lava erupted from the Sundhnúkur volcanic system in southwest Iceland on January 14th, 2024. Lava flows welled up from a new gap, attacking the suburbs of Grindavík with at least three houses in their path burnt down. Nearby, construction vehicles that had been working for weeks to build large earthen dams in an attempt to divert(使转向)the lava’s flow had to pull back.

Lava is subject to gravity like other fluids, so it will flow down along a path of steepest descent(斜坡). With the temperature of its molten rock often well above 1,000 degrees Celsius, not much can stand in its way. Humans have tried many ways to stop lava in the past, from attempting to freeze it in place by cooling it with sea water, to using explosive s to cut off its supply. However, no attempt was successful.

Most recent efforts have focused instead on building dams in an attempt to divert the lava’s flow toward a different path of steepest descent, into a different “lavashed,” where lava would naturally flow. Results have been mixed, but diversion can be successful if the lava flow can be clearly diverted into a distinct area where lava would naturally flow — without threatening a different community in the process. Many attempts to divert lava have failed, however. Barriers built in Italy to stop Mt. Etna’s lava flows in 1992 slowed the flow, but the lava eventually over topped each one.

Diverting lava in Grindavík is difficult, in part because the land around Grindavík is relatively flat, making it harder to identify a clear alternative path of steepest descent for redirecting the lava. Icelandic officials reported on January 15th that most of the lava from the main fissure had flowed along the outside the barrier, however a new gap had also opened inside the perimeter(外围), sending lava into a neighborhood. Unfortunately, that implies that Grindavík remains at risk.

3 . As newer, more advanced technologies come out, huge amounts of electronics (电子产品) are thrown away, instead of being reused. These goods often end up in landfills, where the chemicals inside them may be a danger to the environment. Electronics can contain harmful materials. If these materials get into the ground or water, the pollution can cause serious problems. Most electronics require metals. These metals must be mined from the Earth. Often the mining process creates serious pollution.

A group known as Waste Electrical and Electronic Equipment (WEEE) Forum is trying to make people more aware of the problems of e-waste. Recently, the WEEE Forum asked researchers from the United Nations (UN) to study a kind of e-waste that’s often not noticed because people don’t consider the goods to be electronics. The WEEE Forum calls this kind “unable-to-be-seen” e-waste.

The UN study shows that about 1/6 of all e-waste is “unable-to-be-seen”. Though it’s “unable-to-be-seen”, it’s certainly not a small amount. The “unable-to-be-seen” e-waste weighs about 9 billion kilograms. The WEEE Forum says that if this e-waste were put into 40-ton trucks and the trucks were then lined up, the line of trucks would be about 5,630 kilometers long.

The surprising kind leading the “unable-to-be-seen” e-waste group was toys. Worldwide, roughly 7.3 billion electronic toys are thrown away each year. These include goods like car racing sets, electric trains, and musical toys. They also include toys with electronic parts, like dolls that speak or games with electronic timers. In all, toys make up about 35% of “unable-to-be-seen” e-waste. But the problem is far larger than just toys. The report also shows that other everyday goods like home alarms, smoke alarms, power tools, and computer cables (电缆) are also big sources of “unable-to-be-seen” e-waste.

The WEEE Forum is hoping that as more people and governments become aware of e-waste, they will make a much greater effort to make sure electronics get reused.

4 . The loss of housing due to floods is an undeniable issue. But now, Japanese housing developer Ichijo Komuten recently unveiled a “flood-resistant house” that can not only remain waterproof during floods, but also float off the ground.

Their new “flood-resistant house” was recently featured on a popular Japanese TV show and it has been getting a lot of attention online ever since. Japan’s TBS TV station recently visited one of Ichijo’s test sites where the company’s new flood-resistant house was being put through a simulated flood. Although it looked just like an ordinary house when the test began, by the time that water started rising around it, viewers could see the structure leave the ground and eventually float a few inches above it.

We’ve all seen floating houses being swept away in severe floods, but Ichijo’s newest invention features a system that prevents just that. The house is connected to a number of thick iron rod(杆)sticking out of the ground with thick cables(缆绳)that ensure it stays in place as the water floods past. When the water recedes, the floating house comes back down in its original position. The “flood-resistant house” also features special vents(通风口))hat close up in the event of flooding, and the plumbing also has special valves that prevent water from getting into the home. Electrical equipment like air conditioning is positioned on the upper half of the building to ensure that water doesn’t reach it.

According to engineers at Ichijo Komuten, most homes flood when water reaches the window level, but because their flood-resistant house can float up to five meters above ground, water is unlikely to reach the windows and everything else is sealed shut.

5 . Not even the sea is safe from the glare (强光) of humans’ light at night. Researchers published the first global maps of ocean light pollution. It shows large parts of the sea lit up at night. And that risks confusing or disrupting the behaviors of sea life.

Tim Smyth led a team to research where in the water this glow is strongest. Smyth and his colleagues started with a world map of man-made night-sky brightness that had been created in 2016. Then they added data on the ocean and atmosphere. Some data came from shipboard measurements of man-made light in the water. Others came from satellite images that judge how clear the water is. Particles (微粒) in the water, such as tiny floating plants and animals, can affect how far downward light travels. These factors vary from place to place and may change with the seasons. The team also used computers to copy how different wavelengths of light move through water.

Next, they wanted to know how that underwater light might affect animals. Not all species will be easily affected. The team focused on copepods (桡足亚纲甲壳动物) . These common creatures are a key part of many ocean food webs. They use light as a signal to move all together to the dark deep, seeking safety from other surface creatures. Normally they use the sun or the winter moon as their signal. Too much man-made light can mess up their usual patterns.

Light pollution is strongest in about three feet of the water. Here, man-made light can be strong enough to confuse the copepods. Nearly 2 million square kilometers of ocean get such strong night light. That’s an area about the size of Mexico. Farther down, the light gets weaker. But even 65 feet deep, it’s still bright enough to bother copepods across 840,000 square kilometers of ocean.

The team described its findings December 13 in Elementa: Science of the Anthropocene.

7 . The African penguin lives on St. Croix island off the east coast of South Africa. A new study has found that they are leaving their natural environment to escape noisy ship refueling (补给燃料) activities.

The African penguins once mainly raised babies on this island. But the population has dropped sharply since South Africa started permitting ships in the area to refuel at sea six years ago, the study found.

Lorien Pichegru is acting director of the Coastal and Marine Research Institute at Nelson Mandela University, which led the study. She said the organization had found that noise levels in the area had doubled since the refueling activities began. Scientists say high noise levels affect the ability of penguins to find and catch other animals for food. Noise also makes it more difficult for them to communicate with each other and map travel paths. ‌“This year we are at 1,200 breeding pairs at St Croix from 8,500 pairs in 2016,” Pichegru said.

The study recently appeared in the publication Science of the Total Environment. The researchers said the study is the first to explore the effects of ocean traffic noise pollution on a seabird.

Nelson Mandela University’s study collected some data to estimate underwater noise from passing ships. Oil-covered penguins were found in 2019 in Algoa Bay after an oil spill from ship-to-ship refueling. Environmental groups have called for the activities to be banned in the bay.

Pichegru said penguins in the area were already struggling to survive because of a series of issues, including industrial fishing activities. She added that the refueling activities did not kill all the penguins. However, ‌“It was just the thing that made the whole ecology tip over and then the penguins couldn’t cope with that,” she said.

8 . Tropical (热带的) forests could become so hot that some kinds of leaves will no longer be able to conduct photosynthesis (光 合 作用), according to a study. The photosynthetic machinery in tropical trees begins to fail at about 46.7℃ on average. The research suggests that forests may be nearing dangerous temperature sooner than expected. Models predict that once we hit a global temperature increase of 3.9℃, these forests might experience mass leaf damage.

Chris Doughty, an associate professor at Northern Arizona University and the lead researcher of the study, said the leaf-warming experiments had revealed a nonlinear rise in temperatures. “We were really surprised that when we warmed leaves by 2, 3 or 4℃, the highest leaf temperatures actually increased by 8℃. This shows a concerning nonlinear feedback that we were not expecting.” said Doughty. “If we adopt a do-nothing response to climate change and tropical forest air temperatures increase by greater than 4℃, there could be massive leaf death.” he added.

Avoiding high emissions (排放) in the first place is key to stabilizing temperatures. “We should do all we can to avoid high-emissions. Under low-emissions, almost all tropical forest tree leaves can avoid death from overheating and the trees will survive,” said Simon Lewis, a professor of global change science at University College London. “Yet what the study doesn’t look at is heatwaves. We still might see tree deaths from overheating for limited periods during heatwaves under lower emissions.”

Researchers suggest that the damage is not yet unchanged. “Vote for people who are serious about addressing climate change and transferring to low-carbon economies, ”Disney, one researcher, advocated. More generally, we can all recognize the importance of supporting those countries and people who live in and rely on tropical forests economically, But the serious changes to tropical forests don’t just affect the local people it’s a global issue.

9 . Plastic mobile phones cases and sweet wrappers, some more than 50 years old, have recently been pulled from the sea off the coast of East Yorkshire. The finds lead to growing concern among scientists about the long-term impact of plastic waste on our seas, with research suggesting it takes over 400 years for a drinks bottle to breakdown in the sea.

Notpla, a London-based startup company, is currently designing a seaweed-based replacement for single-use plastic packaging. Founded in 2014, the company has been sparing no efforts to further develop its product line.

The firm initially looked to seaweed as the solution to the world’s white pollution, because it is plentiful, grows quickly, doesn’t compete with land crops and doesn’t use chemicals, but absorbs carbon from the air. Design director Karlijn Sibbel says, “It can grow into the sea, where it actually has many positive benefits so it can create new ecosystems for other organisms to grow in.”

Sibbel says they look to nature as inspiration “for the ideal packaging” like the skin on a fruit. “A peel (果皮) will eventually be used as nutrients by nature, disappear and become part of the cycle.”

“The exciting thing is that this is a film that can replace most of the flexible packaging you see around,” Sibbel says. The potential contents could include coffee grounds or toilet paper. For food items, such as noodles, they have even experimented with adding flavors to the packaging, so that dissolving the bag could add seasoning to the food. “You can cook with it. And you can really start to rethink what we can do with these materials,” she explained.

The approach feels especially relevant as the world is coming to terms with the effects of decades of uncontrolled plastic production. Co-CEO Paslier says, “We’re excited to see our power in the foodservice industry and looking forward to moving into the fashion markets very soon.