2 . Lisa Gautier receives nearly a dozen parcels of human hair every day. With her San-Francisco-based non-profit organization Matter of Trust, Gautier turns donated hair into mats used to soak up oil spills on land, and booms(long tubes)used for spills at sea.

A standard way to clean up oil from land is to use mats made from polypropylene(聚丙烯). But polypropylene is a non-biodegradable plastic, and producing it ultimately means more drilling for oil. Hair, by contrast, is an environmentally friendly resource that can soak up around five times its weight in oil, according to Matter of Trust, and it is abundant.

Oil spills can pollute drinking water, endanger public health, harm plants and wildlife, and damage the economy. According to Gautier, the spills that hit the headlines only make up 5% of global oil pollution.

Megan Murray, an environmental biologist at the University of Technology Sydney, develops sustainable technologies to tackle oil spills. Her research indicates that as well as being biodegradable, human hair is often just as effective as polypropylene, and in some circumstances even better. “The hair mats are very beneficial to land spills,” says Murray but adds that when raw oil is spilled on beach sand, it is very difficult to absorb it using any of the materials she has tested. Another advantage of hair is that it costs less than conventional materials and is “globally available as a recycled material,” she says.

However, Murray cautions that hair mats are not a perfect solution, because they are single-use, and can only be dealt with by burning or by burying into soil which then isn’t suitable for growing food. She is now researching methods to extract the oil from a used hair mat, meaning both can be reused.

As the hair mat designs aren’t under patent, other groups have begun producing their own mats and booms. Gautier is pleased to see the movement growing. “Anyone can make a hair mat,” she says. “It creates green jobs, it cleans water, it reduces waste in landfill, and it’s promoting renewable resources.”

3 . People are looking for ways to reduce their carbon footprint. Purchasing property that is environmentally responsible is a good investment for those who are _______ their own health and the well-being of the earth. Based on this trend, eco-communities are being designed with a green _______ in mind. Dockside Green in Victoria, British Columbia is one of them.

If everything goes according to plan, Dockside Green will be a _______ community along the harbor front of British Columbia’s capital city. The community will be home to 2,500 people and will _______ residential, office, and retail space. Builders of Dockside Green have the environment in mind with every choice they make. They ensure proper ventilation (通风), and guarantee residents 100% fresh indoor air. Building materials, such as paints and wood, are _______ and non-poisonous. Eco-conscious builders use bamboo wherever possible because it grows fast and does not require _______ to grow.

Energy efficiency is one of the _______ concerns in eco-communities, such as Dockside Green. Not only do energy-efficient appliances and light fixtures (照明设备) reduce the environmental _______ of heating and hot water, but they also save residents and business owners money. Dockside Green claims that homeowners will use 55% less energy than average residents in Canada. Residents will have individual water metres (水表) _______ studies show that people use around 20% less energy when they are billed for exactly what they use. ________, water is treated at Dockside Green and reused for flushing toilets.

Planners of eco-communities such as Dockside Green must take the ________ into consideration. Dockside Green plans on reusing 90% of its construction waste. They also plan to continue using local suppliers for all of their transport and maintenance needs. This is a great way to reduce ________.

Dockside residents will be encouraged to take advantage of a mini transport system and buy into the community’s car share program. Finally, plans are underway for a high-tech heating system that will use ________ energy instead of fossil fuels.

Dockside residents will ________ excellent local services with high-quality healthcare, shopping and education at the heart of the community, along with excellent leisure facilities and plentiful green open spaces. Eco-communities will prefer the use of locally-sourced goods and services; they will be ________ places to live, promoting a sense of civic pride, responsibility and, as the name suggests, community.

5 . Used electronics are piing up fast: they are filling up landfills with dangerous pieces of waste. Some e-waste is relatively large, such as air conditioners; other e-waste is more unnoticed, such as smart labels that contain disposable batteries and other equipment.

“It’s these small batteries that are big problems,” says University of California, Irvine, public health scientist Dele Ogunseitan, who is a green technology researcher and adviser for major tech companies and was not involved in developing the battery. “Nobody really pays attention to where they end up.” Researchers at the Cellulose & Wood Materials Laboratory at the Swiss Federal Laboratories for Materials Science and Technology are working to address this problem. Their new paper describes a water-activated paper battery developed from environmentally friendly materials that could eventually present a sustainable alternative to the more harmful batteries common in low-power devices.

The paper battery has the same key components as standard batteries but packages them differently. Like a typical chemical battery, it has a positively charged side and a negatively charged side. A traditional battery’s components are covered in plastic and metal; in the new battery, however, the positively and negatively charged sides are inks printed onto the front and back of a piece of paper. That paper is filled with salt, which dissolves (溶解) when the paper becomes wet. When the paper is dry, the battery is shelf-stable. Once the paper is wet, the battery starts working within 20 seconds. The new battery’s operating performance declines as the paper dries. When the scientists rewet the paper during testing, the battery regained function and lasted an hour before beginning to dry out again.

That future may not be so far off. It is hard to predict a time line for manufacturing such items at scale, but the head of the study says he is in contact with potential industry partners and believes these batteries could make their way into products within the next two to five years.

8 . Many cities around the world today are heavily polluted. Careless methods of production and ________ of consumer demands for environment friendly products have ________ the pollution problem. One ________ is that millions of tons of glass, paper, plastic, and metal containers are produced, and these are difficult to get rid of.

________, today, more and more consumers are choosing “green” and demanding that the products they buy should be safe for the environment. ________ they buy a product, they ask questions like these: “Will this shampoo damage the environment?” “Can this metal container be ________ or can it only be used once?”

A recent study showed that two ________ five adults now consider the environmental safety of a product before they buy it. This means that companies must now change the ________ they make and sell their products to make sure that they are “green,” that is, friendly to the environment.

Only a few years ago, it was impossible to find green products in supermarkets, but now there are hundreds. Some supermarket products ________ labels to show that the product is green. Some companies emphasize that their products are clean and safe in their advertising and have made it their main selling ________.

The ________ for a safer and cleaner environment is making companies rethink ________ they do business. No longer will the public accept the old ________ of “Buy it, use it, throw it away and forget it.” The public ________ is still here, and companies are ________ their act gradually.

9 . A satellite is about to demonstrate a new way of capturing space junk with magnets for the first time. With the frequency of space launches dramatically increasing in recent years, the potential for a disastrous collision above Earth is continually growing. Now, Japanese orbital clean-up company Astroscale is testing a potential solution.

The firm’s End-of-Life Services by Astroscale demonstration mission is scheduled to lift off on 20 March aboard a Russian Soyuz rocket. It consists of two spacecraft: a smaller “client” satellite and a larger “servicer” satellite, or “chaser”. The smaller satellite is equipped with a magnetic (磁力的) plate which allows the chaser to dock with it.

The two stacked spacecraft will perform three tests once in orbit, each of which will involve the servicer satellite releasing and then recapturing the client satellite. The first test will be the simplest, with the client satellite drifting a short distance away and then being recaptured. In the second test, the servicer satellite will set the client satellite tumbling before catching up with it and matching its motion to grab it.

Finally, if those two tests go well, the chaser will live up to its name by letting the client satellite float a few hundred metres away before finding it and attaching to it. All of these tests will be performed autonomously, with little to no human input once they are set in motion.

“These kinds of demonstrations have never been done before in space — they are very different to, say, an astronaut controlling a robotic arm on the International Space Station,” says Jason Forshaw at Astroscale UK. “This is more of an autonomous mission.” At the end of the tests, both spacecraft will burn up in Earth’s atmosphere.

If companies wanted to use this capability, they would have to attach a magnetic plate to their satellites so they could be captured later. Because of the growing space garbage problem, many countries now require firms to have a way to bring back their satellites once they run out of fuel or fail, so this could be a fairly simple likely plan, Forshaw says. Right now, each chaser can only nab one satellite, but Astroscale is working on a version that could drag three or four out of orbit at once.

The Student Union