Everyone can help to save the world

    We are all environmentalists now. We all know about acid rain and the ozone hole. {#blank#}1{#/blank#} As consumers we have the power to make decisions which will contribute to a better world and it is in our power to do what we can to protect the earth.

    {#blank#}2{#/blank#} In this way we have the power to influence retailers (零售商) to sell us these so-called “green” products. Therefore, the supermarkets have understood the message and are now trying to improve their environmental image. They are turning to less wasteful and recyclable packaging. The range of “green” products will continue to expand to meet the growing demand. This message has also reached the manufacturers. {#blank#}3{#/blank#} They have realized that protecting the environment may start as an advertising campaign but in the hands of intelligent people it can become a very profitable business. Besides, we can do more.

    Furthermore, we also know there are other areas where all of us can make a positive contribution to a cleaner, healthier and safer environment. {#blank#}4{#/blank#} There are a number of ways we can do this. For example, we now know how important it is to have our homes well insulated (隔热). We should choose the best energy efficient technology, such as modern light bulbs which can reduce electricity consumption by 80% over the older ones. We must also work hard to reduce the amount of rubbish we produce. We all produce tons of rubbish and waste disposal has become a big problem. As an environmentally-conscious consumer we should buy products which do not have so much packaging. Also, we should try to avoid non-returnable goods at all costs. In Scandinavia and Germany, for example, plastic bottles and cans are now returnable goods.

    In conclusion it is important to emphasize once again the rise of consumer power. We must realize that we are all part of the problem.   {#blank#}5{#/blank#}

A. We can all reduce energy consumption at home and so cut the emissions from power systems.

B. For example, when we walk into a supermarket we can choose to buy environmentally friendly products and reject products which damage our planet.

C. There are some other ways to protect the environment.

D. Companies are developing environmentally friendly products that maintain a high quality and a low price.

E. But what are we doing about these problems?

F. Nevertheless we must also realize that we have the responsibility to be part of the solution.

G. Everybody has the duty to contribute to a cleaner world.

    This activity will melt away the pounds, build your body and leave you on an emotional high. Yet the form of exercise, the fitness trend of the year, does not require gym membership or a personal trainer. All you need to do is walk.

    “Walking is a refreshing alternative to complicated aerobic ( 氧) routines and overpriced gym membership,” says personal trainer Lucy Knight, author of a new book on the exercise. “It is free, enjoyable and already a part of everyday life. All you need to do is correct your technique, walk faster and for longer and you will lose weight.”

    There is much evidence of the benefits of walking. Scientists at the University of Pittsburgh recently discovered that overweight people who walked briskly ( 快) for 30 to 60 minutes a day lost weight even if they didn't change any other lifestyle habits. Another American study found that people who walked for at least four hours a week gained less weight than couch potatoes as they got older. Researchers at the University of Massachusetts medical school found that people who walked every day had 25 percent fewer colds than those who sat a lot. Best of all, walking makes you feel good about yourself. “For people suffering from depression, walking three to four times a week for 30 minutes has been shown to lift their mood,” says Knight.

    But how to walk your way to weight loss and wellness? Health experts recommend that we should walk 10,000 steps a day to stay healthy. Actually you would probably need to walk at least 16,000 steps a day to lose weight. “Your workout plans depend on your level of fitness. You should aim to progress by increasing your walking time by five minutes every two weeks, and walk a bit faster. In just three months, the results should speak for themselves,” says Knight.

    As anyone who freelances(做自由职业) knows, there are lots of advantages of working at home alone. But there are drawbacks too, like the potential loneliness. No wonder co-working spaces are becoming so popular: they permit self-employed individuals to feel like they are part of all office environment, while making them get some work done too. But renting a co-working space does cost money.

    Now a Swedish project is aiming to change that by turning people's under-used homes into temporary co-working spaces, available to freelancers for free. Hoffice was started by freelancers Christofer Gradin Franzen and Johline Zandra about a year ago in Stockholm when they invited a few people into their home office to work together. It was a great success, and the project has since spread to a number of cities in Europe, North and South America, Australia, India and Japan. Anyone can sign up and offer their home space as a free co-working space, or go to find a Hoffice near them.

    On a Hoffice day, everyone arrives and starts work at a certain hour. After 45 minutes, everyone gets up to take a break, stretch, do qigong or yoga for 10 to 15 minutes. Afterwards, people can gather around again, and restate their intentions and goals for the rest of the workday, as a way to motivate each other. Meals can be eaten together at a certain hour, potluck-style(家常饭) or by bringing your own lunch.

    This process creates an encouraging and supportive work environment. As some freelancers describe,“By working at Hoffice, we give ourselves and each other the gift to spend our days in a social working environment, where we are extremely productive without ignoring our other human needs. We also make sure to give us and each other what we need to feel calm, happy, inspired and creative during the working day.”

    So Hoffice is not just about sharing space; it's also about a free exchange of ideas. And perhaps the best thing is that Hoffices are free to use.

    Over millions of years, African penguins have developed a keen sense of where to find food. Once they're old enough, they set off from the shores on which they were hatched（孵化） for the first time and swim long distances in search of tasty fish like anchovies and sardines. But they don't search directly for the fish themselves. When African penguins head out to sea, they look for areas with low surface temperatures and high chlorophyll（叶绿素）. Because those conditions signal the presence of algae（藻类）. And lots of algae means lots of plankton（浮游动物）, which in turn means lots of their favorite fish. Well, that's what it used to mean.

    Climate change plus overfishing have made the penguin feeding grounds a mirage（海市蜃楼）. The habitat is indeed plankton﹣rich, but now it's fish﹣poor. Researchers call this an "ecological trap." "It's a situation where you have a signal that previously pointed an animal towards good﹣quality habitat. That habitat has been changed, usually by human pressures. The signal stays, but the quality in the environment gets worse."

    Richard Sherley, a zoologist at the University of Exeter and his team used satellite imaging to track the African penguins from eight sites along southern Africa. Historically, the birds benefited from tons of fish off the coasts of Angola, Namibia and western South Africa, but now they're going hungry.

    "I was really hoping we'd see them going east, and finding areas which the fish had moved to but it ends up being quite a sad story for the penguins." said Richard.

    The researchers calculate that by falling into this ecological trap, African penguin populations on South Africa's Western Cape have declined by around 80 percent.

    Some research groups are exploring the idea of moving them to a place where they can't get trapped, like the Eastern Cape. But Sherley thinks that a solution in the long run means making and carrying out rules to create more sustainable（可持续的） fishing industry, which needs public support.

    Older women who walk a little over three kilometers each day might live longer than less active women of the same age, a new study suggests.

    Many Americans hoping to stay healthy set a daily goal of 10, 000 steps, or about eight kilometers. They often have this goal because they are wearing electronic devices which set that target, note researchers in the United States. Their findings appeared recently in the publication JAMA Internal Medicine.

    But it is not clear how much intensity(强度)or speed matter when counting the health benefits of every step, the researchers write. They add that 10,000 steps per day might not be the right goal for everyone.

    For the study, researchers observed 17,000 women, all in their early 70s. They asked the women to wear accelerometers for at least four days. Accelerometers are small devices that measure the number of steps and the intensity of movement. The researchers followed up with the women much later, around 4. 3 years later, on average. Since the beginning of the study, 504 women had died. Compared to women who took no more than 2, 718 steps daily, the women who took at least 4,363 steps per day were 41 percent less likely to die.

    "Even a modest amount of steps is associated with lower death rates," said I-Min Lee, the lead writer of a report on the study. "The rate of stepping did not matter in these older women: it was the number of steps that mattered.

    The study had a few limitations. For example, the researchers only measured women's movements once, at the start of the study period. It is possible that the women's behaviors changed over time. Still, the results are "good news for older adults who may have difficulty walking at faster paces, "said Keith Diaz, a researcher at Columbia University. He was not involved in the study.

    "Any walking is better than nothing," Diaz said by email. "With even small amounts of walking, your risk of death will be sharply reduced "For those who have difficulty walking, other research shows that any form of aerobic activity provides health benefits," he added. "Swimming, bicycling or any form of activity that is continuous in nature will provide health benefits.

Museum lets visitors walk in the shoes of a police officer

Police shows on TV are filled with high- speed car chases and crimes solved in a few minutes. But that's not a typical day for a real- life police officer. To get a more accurate picture, head to the National Law Enforcement Museum in Washington. Exhibits there invite visitors to use their senses of sight, hearing, touch and smell to gather information the way police do.

Let's look at a few exhibits.

K-9 Units

See a video of how dogs are trained to join K-9 Units. Test your ability to smell and identify various scents(气味). Learn which kinds of dogs are better at tracking bad persons while others are better at sniffing out dangerous goods.

The Web of Law Enforcement

You' ll quickly learn that crime- solving is a team effort, not only within one department, but among organizations across the country. Inspection Service is just one of the law enforcement groups helping local police when needed. For example, six organizations worked together on a national park graffiti(涂鸦) case.

Five Communities

Every community is different. Learn how the needs and challenges of five communities are being dealt with. These communities goals are to develop programs, while increasing trust between local people and police. What might work in your neighborhood? There's a place for visitors to share their thoughts.

The Training Simulator

Those aged 12 and older can try the same training scenarios(方案) and . equipment used in professional law enforcement classes in which police try to resolve difficult situations. Short videos test participants' abilities to observe accurately and think quickly before reacting.

The exercises give an understanding of what officers face on a daily basis.

" Many kids first think it's like a video game," said Alan Davis, an educator and New York police officer." They soon realize that real- life decision- making in a second isn't easy, and they freeze. For real police there are no second chances."