1 . In Mumbai, there’s the ceaseless clamor of car homes as drivers edge through traffic. There’s pounding and buzzing from the construction of office towers and apartment blocks. Drumbeats and trumpet melodies spill out from weddings and countless festivals. And it’s all topped off by bellowing (大声吼叫的) street vendors and garbage trucks blasting Bollywood songs. Living in Mumbai requires a huge ______ for noise.

When Sumaira Abdulali began campaigning against noise pollution in India’s financial capital two decades ago, friends, acquaintances and even her lawyers insisted it was ______ . “People told me it’s foolish to even try, because Indians love noise,” she says. “We’re a noisy country.”

But in 2003, Abdulali won a lawsuit seeking to ______ environmental rules that had allowed loud music late into the night during a festival. ______ , the victory led to a ban on loudspeakers within 100 meters of schools, hospitals, courts and places of worship. And she has since won more than a dozen other actions both on her own and via the Awaaz Foundation (awaaz means “noise” in Hindi), which she launched in 2006.

The World Health Organization warns that noise is a top threat to human ______ , affecting not only hearing but also sleep, brain development and cardiovascular health. Abdulali claims Mumbai is the world’s ______ city. A study led by Ritesh Vijay, an expert from India’s National Environmental Engineering Research Institute, did find that noise levels in Mumbai and surrounding areas in 2020 dramatically exceed legal limits.

In recent years, the battle against noise has become increasingly ______ , with Abdulali often facing powerful interests who consider it an inevitable byproduct of growth. With increasing ______ , ever more people are exposed to continuous noise. In a rapidly expanding city such as Mumbai, with a population topping 12 million, demand for housing puts noise rules ______ development plans. Although sound barriers are required for construction projects, they’re expensive, so developers ______ installing them.

Traffic is a tougher problem. Noise on the road can reach 110 decibels (分贝) — a level that can lead to permanent hearing damage after just 15 minutes of exposure, according to the US Centers for Disease Control and Prevention. Luckily, ______ can help in the fight, Vijay says. He suggests devices that measure horn use, which would let officials offer ______ drivers rewards like deductions (扣除) on car insurance. Dynamic signaling, where sensors linked to stoplights detect traffic density, would improve vehicle flow and ______   the urge to resort to horns, he says. Local government also ______ . Mumbai decreed (颁布) India’s first “No-Honking” day in 2008, with police handing out booklets to raise awareness about traffic noise and imposing fines up to 1,000 rupees ($12) on offending motorists.

Far more important is the longer-term impact of the day-to-day noise, so that’s where Vijay believes activists should focus their energy. “In India we celebrate festivals with lots of noise,” he says. “But our ______ noise itself is beyond the allowed limit.”

The Real Cost of Travel

Mass tourism is a relatively recent phenomenon. The tourism industry     1     (take) off in the middle of the last century and it’s been growing ever since. In the last ten years especially, more and more people have been traveling to places     2     we had previously only read about or seen on television. But what kind of impact does tourism have on the planet?

A voyage to the end of the earth?

A large cruise ship (邮轮) can carry as many as 6,000 passengers and there are upwards of 50 such ships currently     3    (sail) the seas. Cruise ships dump about 90,000 tons of waste into the oceans every year. Any harmful effects of this are made even worse by the fact     4     cruises tend to visit the same places over and over again, thus concentrating the waste in specific places.

Trash on top of the world

From remote ocean habitats to the world’s highest mountain, our trash is everywhere. Though far fewer people go climbing the Himalayas than on a cruise, their impact     5    (still feel). Tourism is vital to the economy of Nepal,     6     it is to many non-industrial countries. But for decades, climbers have been abandoning their unwanted equipment on Everest. For the last few years, clean-up teams of local and international climbers have been organizing hiking trips just     7    (pick) up the waste. One group has brought over eight tons of waste down from the mountain!

When more is not better

Tourism of a different kind is causing problems in Europe. Construction on the Mediterranean coast has been     8     control for years. Beach resorts form an almost unbroken line from Gibraltar to Greece, and natural habitats have disappeared under miles of concrete. And so we pollute the sea, the land, and the air. Low-cost air travel is booming, in spite of (or perhaps     9     (help) by) economic problems. For many Europeans, low-cost flights allow them to take several short vacations a year. Yet curiously, short flights actually have a much bigger effect on climate change than long flights. So, are there    10     (damaging) ways of seeing the world? Traveling by train, for example, is a much greener way of getting around.

91. The Problem of Packaging

A large source of rubbish is packaging material. It often makes up more than 30 percent of the total. To understand why this is true, think of the packaging commonly used for a simple product, such as toothpaste. The packaging includes not only the tube for the toothpaste, but also the box for the tube. This box is put into a plastic wrapper. Then, the boxes are transported in a cardboard container.

Most packaging material ends up in a landfill after it is thrown away. Though necessary, landfills take up valuable space, often stink, and can leak harmful substances into the soil. Landfills not included, the production of packaging material itself is a major source of air and water pollution.

People are now trying to solve the problems caused by packaging materials. In 1991, Germany took the lead by requiring companies to recycle the packaging used for their goods. To do this, the companies set up recycling bins in every neighborhood. Consumers now separate their rubbish into three categories—metal, plastic and paper cartons. They then put it into the appropriate bin. The rubbish sorted, it is transported to recycling company for processing.

The programme worked well at first. However, the amount of rubbish has begun to increase again. One reason for this is that many consumers no longer reduce waste because they think the problem is solved. It seems that to properly deal with the problem of rubbish, everyone must remain alert and do their part.

5 . COVID-19 lockdowns had strange effects on air pollution across the globe

Ever since the covid-19 spread, many changes have come with the _____________ unstoppable virus. China has shown the first sign. Rightly after a strict nationwide lockdown was _____________ in late January, most people were restricted from leaving their homes at all for as long as 3 weeks. As a result, the authority ___________ a sharp decline in the direct emissions of air pollution on a scale never observed before. “Changes in emissions would be significant and ___________ studying for it may bring us new solutions to greenhouse effect,” says Jiset Deew, a chemist at the Harvard University, “The pandemic has caused lots of tragedies, but the lesson we can learn is important.”

Researchers found it a strange but ___________ chance to capture how human economic activity—particularly car traffic—dropped rapidly and thus to seek for the answer to the influence of ___________ traffic on air quality. “Running atmospheric chemistry experiments is often a ___________ task based on the lack of experimental conditions, so we have to _________ really complex reaction chambers and computer models,” says Tg, who now works on the project _____________ organic aerosols at MIT. “But in this unprecedented year, we finally get the chance to __________ our ideas and we hope the new findings will further our understanding of the mechanisms that rule atmospheric chemistry but also offer guidance for policy makers who seek to improve air quality and ____________ climate change.”

During the lockdown, passenger traffic plumbed, and traffic-related emissions—particularly CO₂ and NO₂—__________ accordingly. Vehicles powered by gas directly release huge amounts of CO₂ and NO₂. CO₂, a greenhouse gas, plays a major role in global warming. Besides, NO₂ plays a __________ part in atmospheric reactions that produce ozone which helps __________ UV light (紫外线). Now, experts are still working to __________ how the two gases changed during pandemic.

7 . A recent study published in the journal Science Advances has revealed that the United States ranks as high as third among countries contributing to coastal plastic pollution. The new research challenges the once-held assumption that the US is adequately “managing” its plastic waste. A previous study using 2010 data that did not account for plastic waste exports had ranked the US 20th, globally, in its contribution to ocean plastic pollution.

Using plastic waste generation (产生) data from 2016 — the latest available global numbers — scientists calculated that more than half of all plastics collected for recycling (1.99 million tons of 3.91 million tons collected) in the US were shipped abroad. Of this, 88% of exports went to countries struggling to effectively manage plastics; and between 15-25% was low-value or contaminated (受污染的). It means it was unrecyclable. Taking these factors into account, the researchers estimated that up to 1 million tons of US-generated plastic waste ended up polluting the environment beyond its own borders.

Using 2016 data, the paper also estimated that between 0.91 and 1.25 million tons of plastic waste generated in the US was either littered or illegally dumped into the environment domestically. Combined with waste exports, this means the US contributed up to 2.25 million tons of plastics into the environment. Of this, up to 1.5 million tons of plastics ended up in coastal environments. This ranks the US as high as third globally in contributing to coastal plastic pollution.

“The US generates the most plastic waste of any other country in the world, but rather than looking the problem in the eye, we have outsourced it to developing countries,” said Nick Mallos, senior director of Ocean Conservancy’s Trash Free Seas program and a co-author of the study. “The solution has to start at home. We need to create less, by cutting out unnecessary single-use plastics; we need to create better, by developing innovative new ways to package and deliver goods; and where plastics are inevitable, we need to greatly improve our recycling rates.”

“Previous research has provided global values for plastic input into the environment and coastal areas, but detailed analyses like this one are important for individual countries to further assess their contributions,” said Dr. Jenna Jambeck, Distinguished Professor at the University of Georgia’s College of Engineering and a co-author of the study. “In the case of the United States, it is critically important that we examine our own backyard and take responsibility for our global plastic footprint.”

8 . Beijing is hardly alone in its air pollution problems. The world Health Organization has said that roughly half of the world’s urban population is exposed to pollution at least 2.5 times higher than it recommends.

While it may take years to fix this global problem, innovative minds in the Asia region have come up with creative solutions for living with air pollution.

DIY Purifier

Thomas Talhelm started worrying about the air inside his Beijing home during “airpocalypse” in 2013 when Beijing’s air quality index skyrocketed to a terrifying 755.

The scholar couldn’t afford the luxury of an expensive air purifier. “Fillers are actually very simple— a high efficient filter is all you need to get over 96% of the PM2.5,” he said.

With three of his friends, Talhelm created Smart Air, an air purifier consisting of a basic household fan with a high efficient filter attached to it.

It works as efficiently as the big brands selling for thousands of dollars, removing more than 90 percent of PM 2.5 in your room, according to Talhelm’s research.

Invisible Mask

Infipure’s “nose mask” claims to cut 99% of PM2.5 without the trouble of a surgical face mask.

The filters, made from special materials, are inserted into your nose and aim to be undetectable.

“People care about their health, but don’t want all the downsides that come with a traditional face mask.” Infipure co-founder Francis Law explained.

Plant Backpack

Taiwanese artist Chui Chih has designed a survival device for an apocalyptic world.

Named Voyage on the Planet, a potted plant is housed inside a clear backpack hooked up to two tubes to bring fresh to a face mask. It’s a bold, abstract idea from an oxygen tank.

Smog Vacuum

Daan Roosegaarde has been working on a smog vacuum that will suck pollutants from the sky to the ground like a vacuum, making way for clean air.

A byproduct of this smog vacuum, namely The Smog Free Tower, is the “smog ring”—a piece of jewelry made from smog particulates.

“The pollution we suck up, the small particulates, we don’t throw them away. We put them under pressure for a couple of weeks and they crystallize, creating something like a diamond,” Roosegaardc explains.