Time for a clean-up

You are probably aware of the term “forever chemicals”, if not entirely clear on the specifics. What they are is a class of around 16, 000 artificial compounds called PFAS that break down very slowly, if at all in the environment and our bodies. They are extremely useful, but also a potential     1     to wildlife and human health. After more than 80 years of     2     and often unlimited use, PFAS pollution is more or less everywhere, from the soil on our farms to the rain that waters them. In all likelihood, you have a(n)     3     amount of these chemicals in your body.

A growing body of research has     4     exposure to some types of PFAS to harmful effects, such as kidney disease, immune dysfunction and certain types of cancer. Just a few parts per trillion of some forms accumulated over time is enough to be damaging. Moreover, exposure is more or less     5    . Skipping greaseproof (防油的) packaging or filtering tap water may limit acute exposure, but there are many other pollution     6    . In any case, for most of us, it is already too late.

How did we let it come to this? To some extent, society is reaping what it     7     by permitting so many novel chemicals to be released without a proper system to test their safety first. That has to change, and not just for PFAS. Time and again we find, too late, that industrial chemicals are harmful—as now seems the case with those in some climbing shoes—while     8     the firms that make them to carry on business as usual. There is nothing illegal in that. Nevertheless, the PFAS industry has been extremely     9    . There is good evidence that some producers have known for decades that the chemicals could cause harm, but actively confuse that knowledge. As the science of PFAS advances, there is     10     that they can be replaced, as well as rounded up (聚集) from the environment and destroyed.

4 . Large earthquakes could be identified months or even years in advance by finding unique signals, according to a new research from a team of German researchers.

The research suggests more exact earthquake warning systems require more local and regional sites that can find underground signals. Along with this, finding second faults(断层)after the main rupturing (断裂) fault would further increase the exactness of these readings.

To find this out, the team led by Dr Patricia Martinez-Garzon studied the Kahramanamras earthquake that shook Turkey in early 2023. They found that there was an increase in the earthshaking event rates and larger energy release starting around eight months before the earthquakes.

These signals were found within 65 km of the epicenter (震中). Although the main rupture occurred on a fault line and in an area that was known to be the cause of earthquakes, signals before the event took place both on the main and secondary faults, which hadn’t received much attention from scientists in the past.

Now, short-term prediction (预测) of earthquake size, time and location is just possible. The scientists behind this study believe that long-term finding is seminal to help build our understanding of earthquakes and future events.

But not everyone, including Bill McGuire, professor at UCL, agrees with how useful this could be. “While this is interesting from a scientific viewpoint, it is unlikely that knowing a big earthquake might be on the way within months or years really gets us any further forward in preparing for them,” he says. “The only useful prediction of future earthquakes is arguably the one that exactly fixes the location of a coming quake and its timing to within a few weeks, so as to move people to a safe place.”

5 . Wondering what you can do to celebrate Earth Day on April 22? You’ve come to the right place. We’ve gathered a comprehensive list of Earth Day activities, both fun and environmentally-conscious, to help raise awareness and make a difference. If you’re ready to learn more about joining the global celebration, initiating real change, and doing your part to save our planet, read on!

·Walk or ride your bike.

    1     Plus, it’s a great way to involve physical activity into your daily routine, benefiting both your physical and mental well-being. Even one day can make a difference, but if you can commit to walking or biking more often in the future, that’s even better!

·Use a refillable water bottle.

Consider going with a stainless-steel refillable bottle for a super long-lasting option.     2     Using a refillable water bottle, meanwhile, protects the planet, saves you money, and protects your health.

·Plant a tree.

Pick a tree species that’s native to where you live. If you’re unsure, ask an employee at your local nursery or garden department. Choose the best planting spot to meet the tree’s needs, dig a properly sized hole, and water the tree well to give it a good start.     3     Try donating to a reputable environmental non-profit that will plant trees on your behalf instead.

·Visit a local farmer’s market.

Eating locally grown food is much better for the environment. For example, locally-grown food doesn’t have to be transported long distances to end up on grocery store shelves.     4    

·     5    

See if your community is holding an environmental fair. If your community doesn’t have one planned, consider starting one yourself! It’s the perfect day to get together for a fun and educational celebration of the Earth. Any money raised can go towards a local environmental restoration project or group.

6 . Each spring, millions of people take photos among the famous cherry trees around the Tidal Basin in Washington DC-some even get married there. That’s what Jody Axinn did 10 years ago.

“Now, the romantic spot is unrecognizable. The whole section is under water,” says Axinn who is revisiting the cherry trees with her family. “When I got here 10 years ago, the place was flooded regularly, but certainly not twice a day, every day.”

There are two forces working together to affect the Tidal Basin, the trees and monuments around it. The seawall around the basin, built with mud dug up from the Potomac River bottom, has sunk about five feet over the past century.

“At the same time, the water level in the basin has gone up by more than a foot because of climate change,” explains Leslie Frattaroli, manager of the National Park Service (NPS). “The Tidal Basin looks like a small lake, but it’s actually part of the Potomac River, because there are gates at the upstream and downstream ends of the basin that allow river water to rush through. Therefore, it is gradually rising along with the level of the world’s oceans.”

Combining these two factors, the water is six feet above where the seawall was originally designed to keep it out. Later this spring, the park service will start to raise parts of the walkway around the basin and along the Potomac River.

“It would be impossible to complete the $113 million project without removing the cherry trees along the water,” Leslie says. “The good news is that when the project is completed in 2027, 274 new cherry trees will be planted.”

Among the trees to be removed is a very famous little tree known as “Stumpy”. At high tide (潮汐), the base of the tree is flooded. Although it is in extremely bad conditions, its remaining three or four small branches burst into flower each spring, with the Washington Monument standing tall in the background.

7 . Look, let’s be honest-there’s no such thing as a “green” vacation. You’ll leave a carbon footprint, no matter what.     1     Here are a few questions to ask:

Is it a B Corp?

B Corps are businesses that meet a strict set of standards by the nonprofit B Lab. They include requirements for governance, workers, customers, community and the environment.     2     You’ll see some fairly well-known brands, like Intrepid Travel. But you won’t find the names of any major airlines, car rental companies or hotel chains-at least, not yet.

Does the company have any other environmental certifications?

Third-party certifications from Green Key, LEED and WELL can be signs that a travel company means business about the environment. Transportation companies may also offer verified certifications from organizations like Terrapass or the Gold Standard Foundation.     3     However, it’s a good start.

    4    

If the company claims to be green, don’t just take its word for it. Listen to what it says. If you see nothing but models on its Instagram channel or ads for online discounts on its site, perhaps it’s a shade of fake green. “A company’s social media strategy is generally a reflection of its current ethos and goals,” explained Julia Carter, founder of Craft Travel.

How deep is its commitment to the environment?

    5     For example, the Travel Corporation publishes an annual impact report that maps its progress against 11 sustainability goals developed by the United Nations. Many cruise lines also publish detailed reports that allow you to check their commitment to the environment against several objective standards.

8 . Aviation is a big polluter. Cutting the sector’s impact on global warming is high on the agenda. Although many governments are regulating emissions from cars and trucks, air transportation is technologically rooted in old patterns.

Facing the reality that the sector will keep emitting a lot, ICAO has established an international carbon-trading plan—Carbon Offsetting and Reduction Scheme for International Aviation, or CORSIA. This encourages wide use of offsets (抵消) : aviation companies can buy emissions credits or invest in sectors that store carbon, such as forestry, to allow them to carry on as normal. CORSIA aims to keep CO2 emissions at 2019 levels through such purchases for emissions over that year’s baseline. ICAO predicts that increasing demand might reach 1. 7 billion tons by 2035, potentially making aviation the largest offset market in the world.

Yet offsetting faces a fundamental challenge: the size of the offset requires estimating flows of warming pollution that would have occurred if the carbon-removal project hadn’t existed, and comparing them against flows with the project in place. The former — a baseline that is unobservable — is a hotbed for shady accounting.

The vast majority of offsets today and in the expected future come from forest-protection and regrowth projects. The track record of reliable accounting in these industries is poor, because they lack convincing baselines. Even with oversight, forest projects are often troubled by wild assumptions, for example that trees would disappear completely from these areas in the absence of those projects, even when there are other forest protections in place. Such assumptions drive up baselines and flood the market with huge volumes of offsets. They make it easier for accountants to claim a net reduction in emissions even though the atmosphere sees little or no benefit. These problems are essentially unfixable. Evidence is mounting that offsetting as a strategy for reaching net zero is a dead end.

In our view, this approach could prove dangerously narrow. Removing aviation’s impact on global warming means upending the industry. The longer that reality is overlooked, the harder it will be to find effective solutions.

9 . The Atacama Desert in northern Chile stretches from the Pacific to the Andes across an expanse of red-orange rock mountains and peaks. It’s a dream destination for tourists. But the Atacama Desert is also one of the world’s fast-growing dumps (垃圾场) of abandoned clothes. The scene in northern Chile has been shown in one online video-large amounts of abandoned clothes stretch as far as the eye can see.

Chile is home to one of South America’s largest duty-free ports-located in the coastal city of Iquique. The duty-free port was established in 1975 to help generate jobs and improve local economy. As fast fashion exploded, so did imports. Millions of tons of clothes arrive annually from all over the world.

“The free zone was a ’true transformation’ for the city’s residents,” says Bernardo Guerrero, a sociologist that studies Iquique’s history and culture. “They suddenly had access to things they could never have imagined.” Clothing began washing in and out of Iquique like waves as global fashions changed. Guerrero recalls a time when almost everybody in the city wore the same style of puffer jacket.

The free zone has also developed into a sorting site for abandoned clothes. Mehmet Yildiz, who operates a clothing import business, brings in clothes from the United States and Europe. Once the clothes reach Iquique, workers separate them into four categories according to quality. Yildiz then exports the best to other countries for resale. Clothing that the importers don’t want will be delivered a few miles outside Alto Hospicio, where it goes through another cycle of sorting and resale in street markets. Clothing that doesn’t sell at the market is sent to the desert, and much of it is made from materials that won’t biodegrade (生物降解).

As helpful as resale markets might have been in an earlier era, they’ve been flooded with the large amounts of the mounting discards. New efforts, large and small, are under way to deal with clothing waste, and attention to the mess in the desert may inspire additional projects.