1 . The green movement is catching on in many pockets of the world. This is especially true in the construction industry. Today's buzz words, which include global warming and zero emissions（排放）, are causing everyday people to look for ways to reduce their carbon footprint. Purchasing an environmentally-friendly home is a good investment for those who care about their own health and the well-being of our planet. Based on this trend, entire districts, known as eco-communities, are being designed with the concept of green in mind. One of these communities is Dockside Green in the Canadian province of British Columbia. Its goal is to become the world's first zero-emission neighborhood.

Dockside Green is a mostly self-sufficient community along the harbor front of Victoria, the capital city of British Columbia. The community is home to around 2,500 people and it includes a variety of environmental features, some of which can't be found anywhere else.

The planners and builders of Dockside Green have the environment in mind with every choice they make. They ensure proper ventilation （通风） and guarantee residents clean air indoors. Building materials, such as paints and wood, are natural and green.

Energy efficiency is attached great importance to in eco-communities like Dockside Green. Not only do energy-efficient appliances reduce the environmental impact of heating, cooking and lighting, they also save residents money. Dockside Green claims that home owners use 55% less energy than the average Canadian.

Eco-communities also take the future into account by recycling waste and reducing carbon emissions. At Dockside Green, waste water is treated and reused on-site for flushing toilets, and a gas plant changes waste wood into a renewable form of gas for hot water systems, stoves and gas heaters. The community also reduces carbon emissions by using local suppliers for all their transport and maintenance（维修） needs, and residents are encouraged to join the community's car share program.

2 . There was no need to consult my smart-watch to know that we had climbed to an altitude of more than 4,500 meters._________discomfort serves as a warning system on the Qinghai-Tibet Plateau.

After a four-hour journey, our coach_________a parking lot in Madoi county, a sprawling herding district in the northwestern province of Qinghai. I got off and took a walk, but it felt like hard work. What seemed like a slightly dazed feeling at lower place—such as when I visited Lhasa, capital of the Tibet autonomous region, in 2019 at about 3,000 meters above sea level—had_________into a severe headache because of the thin air.

As the air pressure_________rapidly, my sunscreen bottle swelled and its_________spilled out. Trees were a rare_________. The soil was frozen. Rice tasted half-cooked.

I_________a small hotel, where about 35 doctors and journalists would stay for the next few days as part of a volunteer medical program. I was assigned a roommate, a photojournalist in his 50s. We climbed_________of stairs carrying suitcases packed with winter clothes and other necessities to_________the sunburn-producing ultraviolet. The climb clearly worsened our symptoms. We were both breathless when we reached our room.

Cracks could be seen meandering across the walls of the room, a warning sign of the quake’s destruction and a__________that the danger had not gone away.

It certainly hadn’t. At about midnight, a magnitude 4.8 quake__________the county and made my roommate and I—both __________because of the discomfort we were feeling—jump out of our beds.

We scrambled for our clothes and shoes and argued about whether we had enough time to run outside. Before we had reached agreement, the shaking had stopped. The street our room overlooked was quickly__________with people, and my sixth sense for survival told me to join those life-cherishing people downstairs, but the__________told me to stay put.

The older man and I stared at each other and then decided to creep back to our beds, but we kept our pants on, just__________.

5 . Innovation has pretty much finished with car tires (轮胎) right, I mean, what’s left to change? How about the whole “air” part?

Michelin Company’s attempt to tackle tire rubbish around the world witnessed them roll out puncture-proof “airless” tires, which they say should help reduce the 18% of all world tires that are abandoned early due to punctures (轮胎漏气). Deserted tires arc a huge worldwide waste problem — the US produces 260 million abandoned tires per year, many of which end up in landfills or on the sides of the freeway where they release harmful gases and microplastic pollutants as they break down.

Michelin Company's Unique Puncture Proof Tire System or “UPTIS” is designed using 46% recycled material, and made from a plastic matrix (母体) mixed with glass fibers that provide a flexible outer layer with a strong inner one. “The truly distinctive structure of the Michelin UPTIS prototype (原型), or its “strangeness” as we have often heard it called, really attracted the eye of many visitors and left a lasting impression on them,” stated Cyrille Roget, Michelin Group Technical and Scientific Communications Director. “It was an unusual experience for us, and our greatest satisfaction came at the end of the demonstration when our passengers, who were undoubtedly a little alert (警觉) at first, said they felt no difference compared with conventional tires.”

Michelin Company believes airless tires will improve everyone's lives. Maintenance (保养) costs for company’s vehicle fleets will be less expensive, and inexperienced car owners won’t accidentally ruin their rubbers when driving them because they are over-or under-inflated (充气). Although they are still in development stage and using at a large scale within years is unlikely to be available, Michelin Company is not in the least doubtful about their tires’ future.

6 . A new study shows that increases in extreme winter weather in parts of the US are linked to quickened warming of the Arctic (北极).

Over the past four decades, warming in the Arctic has been far more definite than that in the rest of the world and has caused a rapid decrease of summer sea ice. Heating in the Arctic has ultimately disturbed the circular pattern of winds known as the polar vortex (旋涡). As a result, it got stretched out of shape and slid southward off the pole. Scientists believe this vortex stretching process led to the deadly Texas cold wave in February this year.

“The polar vortex over the Arctic usually locks in cold air at the poles and does not easily move south. The stronger the winds, the more the air inside is kept, and the colder it gets,” explained lead researcher Dr. Judah Cohen, who’s a professor at the Massachusetts Institute of Technology (MIT). “Melting (融化) ice in the Arctic and rising temperatures can disturb the Arctic vortex, making cold air no longer locked in the Arctic? but move some farther south.”

The researchers say that their findings are based on both observations and modelling and they show a physical link between climate change in the Arctic, the stretching of the polar vortex and the impacts on ground.

The researchers believe their work could improve predictions about the beginning of extreme cold winter events. The research team also believes that their findings will help people understand that global warming is complex and perhaps let go of the idea that colder winters mean climate change isn’t happening. “In the past, these cold extremes over the US and Russia have been used to justify not reducing carbon, but there’s no longer any excuse to not start reducing emissions (排放) right away,’’ said Dr. Cohen.

9 . The idea of billions of people going through a few masks a week during this pandemic definitely rings alarm bells, but a team of researchers in Melbourne may have the solution.

They’ve discovered that adding millions of discarded face masks to road-paving (铺路) mixtures would actually lower the cost of the road, while preventing billions of them from landfills. Just one kilometer of road would need three million masks, and the polypropylene (聚丙烯) plastic used to make single-use surgical face masks also increased the flexibility and durability of the road.

The new material is a mixture of about 2% torn masks, with recycled concrete aggregate (RCA)—a material obtained from waste concrete and other minerals from destroyed buildings. This recycled material was found in the study to be ideal for two of the four layers generally required to create roadways. Paving a kilometer of two-way road with the RCA and three million face masks would result in a change of 93 tons of waste from landfills.

The final product then is more resistant to wear than asphalt (沥青), as well as being cheaper too, provided there was a method for collecting masks. The research team did a cost-analysis and found that, at $26 per ton, the RCA was about half the cost of mining raw materials, and as much as a third of the cost of shipping the used masks to a landfill.

The widespread application would be ideal for large infrastructure (基础设施) projects. For example, Washington has the 11th worst roads in terms of unaddressed repairs in the U.S. If the damaged roads in Washington state were repaired with the RCA/mask mixture, it would reuse nearly 10 billion masks, sparing American landfills hundreds of millions of tons of trash.

It’s said that the team is looking for private industry partners or governments willing to give their plastic mask road an opportunity for a large-scale test.