Europe is now the biggest market for organic food in the world, having grown by 25  percent a year over the past 10 years. Denmark's agriculture minister is herself an organic farmer. The UK market for organic food grew by 55 percent in 2000, while the food market as a whole grew by only one percent. Yet only seven percent of British shoppers account for nearly 90 percent of organic sales. However popular the idea of organic farming may be, it is still an interest for only a few people.

    So what makes the idea of organic farming popular? Organic farming means farming with natural materials, rather than with man-made fertilizers or pesticides. Organic farmers rely on many  methods — such as crop rotation (农作物的轮作) and the use of resistant varieties, because they are necessary for organic farmers to compensate for the shortage of man-made chemicals.

    Organic farming is often supposed to be safer than traditional farming for the environment. Yet after a long research on organic farming worldwide for a number of years, science continues to be against this opinion. The House of Commons committee on agriculture publicized that, even with complete research work, it would fail to find any scientific evidence to prove “that any of claims （宣称） made for organic farming is always true”.

    However, the talk about the benefits of organic farming is going on. This is partly because many people depend on their individual farm, the soil, the weather, and so on.

The Brown Bear

    My wife Laura and I were on the beach, with three of our children, taking pictures of shore birds near our home in Alaska when we spotted a bear. The bear was thin and small, moving aimlessly.

    Just a few minutes later, I heard my daughter shouting, “Dad! The bear is right behind us!” An aggressive bear will usually rush forward to frighten away its enemy but would suddenly stop at the last minute. This one was silent and its ears pinned back—the sign of an animal that is going in for the kill. And it was a cold April day. The bear behaved abnormally, probably because of hunger.

    I held my camera tripod (三脚架) in both hands to form a barrier as the bear rushed into me. Its huge head was level with my chest and shoulders, and the tripod stuck across its mouth. It bit down and I found myself supporting its weight. I knew I would not be able to hold it for long.

    Even so, this was a fight I had to win: I was all that stood between the bear and my family, who would stand little chance of running faster than a brown bear.

    The bear hit at the camera, cutting it off the tripod. I raised my left arm to protect my face; the beast held tightly on the tripod and pressed it into my side. My arm could not move, and I sensed that my bones were going to break.

    Drawing back my free hand, I struck the bear as hard as I could for five to six times. The bear opened its mouth and I grasped its fur, trying to push it away. I was actually wrestling (扭打) with the bear at this point. Then, as suddenly as it had begun, the fight ended. The bear moved back toward the forest, before returning for another attack—The first time I felt panic.

    Apparently satisfied that we caused no further threat, the bear moved off, destroying a fence as it went. My arm was injured, but the outcome for us could hardly have been better. I'm proud that my family reminded clear-headed when panic could have led to a very different outcome.

    Here are a few practical apps that can help you with your studies, and beyond.

    MyHomework

    Price: Free

    Platform: iOS and Android

    As you star your new term, let the planning app MyHomework create a personalized study schedule. Rank as one for the best homework management apps by USA Today, this app allows you to prioritize(排序)assignments by color-coding subjects. It also reminds you of every single deadline and upcoming test you have. MyHomework is not only for smart phones but also for Apple Watch.

    Notability

    Price: 18 yuan

    Platform: iOS

    Taking good notes is important to good results. As a result, one note-taking app, Notability, is gaining popularity among students. This app allows users to take handwritten notes on touch screens and type essays. Plus, Notability users can easily share files with classmates through e-mail or cloud services like iCloud.

    Sleep Cycle

    Price: 6 yuan

    Platform: iOS and Android

    For students struggling to wake up on time during school days, Sleep Cycle can be your lifesaver. It cleverly records your sleep. After you wake up, the app shows your sleep quality through easy-to-read graphics(图表). Even better, Sleep Cycle has an intelligent wake-up mode. It wakes you up when you are in your lightest sleep state with the help of soft music. This stress-free wake-up call can potentially improve your daily productivity.

    MyMoney

    Price: Free

    Platform: iOS and Android

    MyMoney, a Chinese money management app, can help you achieve financial independence. This popular app allows you to add up all your accounts including campus(校园)cards and transportation cards. And it tracks your every expense(开支)to help you understand your spending habits. If any of your accounts is low, MyMoney will alarm you.

    Bookstores are a traveller's best friends: they provide convenient shelter in bad weather, and they often host readings and other cultural events. Here is a look at the world's six greatest bookstores.

    Adrian Harrington—since 1971. Rare books; rare first editions; leather—bound sets and general antiques (古玩). Address: 64A Kensington Church Street, Kensington, London, England, U.K.

    Another Country— Kreuzberg, Berlin, Germany. Another Country is an English language second-hand bookshop which is mostly used as a library. They have about 20,000 books that you can buy or borrow. Some regular events are held at the shop, such as readings, cultural events, social evenings and film nights.

    Atlantis Books—Oia, Santorini, Greece. Atlantis Books is an independent bookshop on the island of Santorini, Greece, founded in 2004 by a group of friends from Cyprus, England, and the United States. Throughout the year it has hosted literary festivals, film screenings, book readings, and good old-fashioned dance parties.

    Bart's Books—Ojai, California, U. S. A. "The World's Greatest Outdoor Bookstore", a bookstore founded by Richard Bartinsdale in 1964. Shelves of books face the street, and regular customers are asked to drop coins into the door's coin box to pay for any books they take whenever the store is closed.

    10 Corso Como—Milan, Italy, Extensive selection of publication on art, architecture, design, graphics and fashion, along with a strong emphasis on photography. It was founded in 1990 in Milan, Italy, by Carla Sozzani.

    The Bookworm—A bookshop, library, bar, restaurant and event space, now with five locations in three cities in China—Beijing, Suzhou and Chengdu. The interconnecting rooms with floor-to-ceiling books on every wall are light and airy in summer, yet warm and comfortable in winter.

    More than 10 million Chinese cultural relics have been lost overseas, lost of which were stolen and illegally shipped out of China during the times of war before 1949. About 1.67million pieces are housed in more than 200 museums in 47 countries, which accounts for 10 percent of all lost Chinese cultural relics, and the rest are in the hands of private collectors.

    Most of these treasures are owned by museums or private collectors in the United States, Europe, Japan and Southeast Asian countries. There are more than 23, 000 pieces in the British Museum, most of which were stolen or bought for pennies more than 100 years ago.

    The major method to recover these national treasures was to buy them back. In some cases, private collectors donated the relics to the government. Also the government can turn to official channels to demand the return of relics.

    In 2003, a priceless bronze pig's head dating from the Qing Dynasty was returned to its home in Beijing after it was removed by the Anglo-French Allied Army over 140 years ago. Macao entrepreneur (企业家) Stanley Ho donated 6 million yuan to buy it back from a US art collector and then donated it to the Poly Art Museum in Beijing. Although buying-back is the most feasible way to recover the lost treasures, limited funding is always a big headache.

    In recent years, the Chinese government has improved efforts to recover the precious cultural relics lost overseas. It has started a national project on the recovery of the treasures and has set up a database (数据库) collecting relevant information. It has signed several international agreements with many countries on this matter, and is also looking for international cooperation to recover the relics by working closely with several international organizations.

On an autumn afternoon, a remote sheep farm in southern Greenland is quiet. The silence is abruptly broken when dozens of sheep come thundering across the hills overlooking the farm. Walking after them are Lars Nielsen and his 37-year-old son Kunuk Nielsen.

The Nielsen family has owned and run the farm since 1972. Kunuk says the summers now are longer than when he was a child and that drought has become a problem. The fields are not so green as those in the old days. He has to buy hay (草料) from European countries.

The effects of a warming climate are obvious on the land. While he intends to struggle on, his older brother Pilu has chosen a different path.

Pilu, 40, lives in Qaqortoq in the south of Greenland -- a town of about 3,000 people. Ten years ago, he got his helicopter pilot's license and is now part owner of a small company called Sermeq Helicopters. It caters to construction and telecommunication workers and an increasing number of foreign tourists.

Pilu says he loves his family's sheep farm. But he saw that warming temperatures were making remote areas of Greenland more accessible and wanted to look for other opportunities. His company's most popular tours include a visit to Greenland's glaciers.

The warming temperatures are also affecting traditional ways of life, particularly hunting. The sea ice is changing; it's becoming less so that hunting on ice becomes more difficult. When there's no sea ice, it's difficult to use dog sledges (雪橇), and the whole culture around having dogs and dog sledges and doing traditional hunting on the ice is sort of diminishing.

Besides, many Greenlanders, like Pilu, are leaving the countryside for towns and the capital city Nuuk, where opportunities are greater. A report found that Nuuk's share of Greenland's population grew from 17.2% in 1977 to 29.2% in 2014. If there were enough houses in Nuuk, the share would even be bigger.