Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

    Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses（球场） in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

    There are many environment-friendly sports. Power walking is one of them that you could take up today. You don't need any special equipment except a good pair of shoes; and you don't have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

    Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be "green gyms". They are better replacements（代替物）for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it's free.

    In my living room, there is a plaque(匾) that advises me to “Bloom(开花) where you are planted.” It reminds me of Dorothy. I got to know Dorothy in the early 1980s，when I was teaching Early Childhood Development through a program with Union College in Barbourville, Kentucky. The job responsibilities required occasional visits to the classroom of each teacher in the program. Dorothy stands out in my memory as one who “bloomed” in her remote area.

    Dorothy taught in a school in Harlan County, Kentucky, Appalachian Mountain area. To get to her school from the town of Harlan, I followed a road winding around the mountain. In the eight-mile journey, I crossed the same railroad track five times, giving the possibility of getting caught by the same train five times. Rather than feeling excited by this drive through the mountains, I found it depressing. The poverty level was shocking and the small shabby houses gave me the greatest feeling of hopelessness.

    From the moment of my arrival at the little school, all gloom(忧郁) disappeared. Upon arriving at Dorothy's classroom, I was greeted with smiling faces and treated like a queen. The children had been prepared to show me their latest projects. Dorothy told me with  a big smile that they were serving poke greens salad and cornbread for “dinner” (lunch). In case you don't know, poke greens are a weed-type plant that grows wild, especially on poor ground.

    Dorothy never ran out of reports of exciting activities of her students. Her enthusiasm never cooled down. When it came time to sit for the testing and interviewing required to receive her Child Development Associate Certification, Dorothy was ready. She came to the assessment and passed in all areas. Afterward, she invited me to the one-and-only steak house in the area to celebrate her victory, as if she had received her Ph.D. degree. After the meal, she placed a little box containing an old pen in my hand. She said it was a family heirloom (传家宝), but to me it is a treasured symbol of appreciation and pride that cannot be matched with things.

    Our summer vacation begins on July 15th and lasts nearly two months. Considering that my brain needs rest after a period of hard work, I, together with my family, went to our countryside, a very small farmhouse in which my grandparents used to live, to spend the summer. Obviously, life in the country is very different from that in the city.

    Early in the morning I took a walk along the field side. The air was fresh and pure. With a dog following, sometimes I ran a race in the meadows covered with tall grass. Sometimes I climbed up the hill to see the sun slowly yet steadily rise from the eastern horizon. The birds also sang restlessly among the bushes. In order to appreciate the quietness of the country, I gave myself entirely to nature, with a light heart and a happy mind.

    Sometimes in the afternoon I, together with my cousins, took a rod and went to the river to fish. It made the family happy when they saw me returning with a basketful of large fresh fish. When night came, I would sit at the door and tell the most wonderful and interesting stories to my cousins, who listened to the tale of wonder with open eyes and mouth.

    I wish I could enjoy such calm, pure and beautiful rural life forever.

    In today's Internet age, the demand for online games continues to grow. Online computer game centers exist in many cities and towns throughout Asia. Facing the pressures of school and life, people tend to the virtual（虚拟的）world, expecting a diversion from these problems. Too often, however, they can lead to problems and unhealthy addictions.

    This is most clearly seen in the example of South Korea. The country has the world's highest percentage of high-speed Internet services. It also has a high number of online game players and related problems. In 2002, a young man collapsed(突然晕倒) and died while playing online games. He had been playing almost non-stop for 86 hours at an Internet café. Another young man killed his sister after becoming confused between the online world and real life. A 12-year-old boy stole US $ 16,000 from his father and ran away from home. He did this to continue his obsession(着迷) with an online game. Such problems, however, don't just happen in South Korea. They are spreading to other parts of Asia as well.

    What kinds of people develop online game addiction? What does the problem look like? Dr. SueHuei Chen, a clinical psychologist, researches Internet addiction. She discovered some signs of at-risk individuals such as lack friendships and good social skills. Those problem individuals feel it so compulsive（强迫的）to play online games that they could sacrifice things such as school or family. They feel the need to spend more and more time online. And they become upset if anyone tries to limit their online game playing.

    How many problem game players are there? In mainland China, the potential number of problem online gamers is alarming. In 2004, the China daily reported that China had 13.8 million online game players. Besides, it stated that 80 percent of these were under 25 and had signs of addiction. Such numbers point toward a growing problem among Chinese youth.

    Make sure to keep control over your online game playing. If you don't control it, it can get control of you.

    In university I had a part-time job at a shop that sold doughnuts and coffee. Situated on a block where several buses stopped, it served the people who had a few minutes to wait for their bus.

    Every afternoon around four o'clock, a group of schoolchildren would burst into the shop, and business would come to a stop. Adults would glance in, see the crowd and pass on. But I didn't mind if the children waited for their bus inside. Sometimes I would hand out a bus fare when a ticket went missing — always repaid the next day. On snowy days I would give away some doughnuts. I would lock the door at closing time, and we waited in the warm shop until their bus finally arrived.

    I enjoyed my young friends, but it never occurred to me that I played an important role in their lives — until one afternoon when a man came and asked if I was the girl working on weekdays around four o'clock. He identified himself as the father of two of my favorites.

    "I want you to know I appreciate what you do for my children. I worry about them taking two buses to get home. It means a lot that they can wait here and you keep an eye on them. When they are with the doughnut lady, I know they are safe." I told him it wasn't a big deal, and that I enjoyed the kids.

    So I was the Doughnut Lady. I not only received a title, but became a landmark.

    Now I think about all the people who keep an eye on my own children. They become, well, Doughnut Ladies. Like the men at the skating rink (滑冰场) who let my boys ring home; Or the bus driver who drove my daughter to her stop at the end of the route at night but wouldn't leave until I arrived to pick her up; Or that nice police officer who took pity on my boys walking home in the rain when I was at work — even though the phone rang all the next day with calls from curious neighbors. "Was that a police car I saw at your house last night?"

    That wasn't a police car. That was a Doughnut Lady.

    (CNN)—This photograph of two men sharing a drink 30 meters below the water is part of an art project exploring the mysterious world of freediving—a form of underwater diving that relies on a diver's ability to hold his or her breath until resurfacing rather than on the use of oxygen tanks (氧气瓶).

    Each man, dressed in shirt, jeans and sunglasses, sits in a chair at the bottom of the Caribbean Sea with local sharks—harmless to humans—swimming just meters away. Of course, these aren't ordinary men, but freedivers: extreme athletes who dive on a single breath of air.

    American photographer Lia Barrett had been taking pictures of brave divers competing at the Caribbean Cup off the coast of Honduras, when she decided to create a fantastic underwater world in which humans go about everyday tasks—such as drinking coffee or riding bikes.

    "After the competitors had a great time in the new national and world records set at the competition, I took advantage of their breath-holding skills to do photo shoots I had only dreamed of before," said the 29-year-old.

    Perhaps unsurprisingly, Barrett is often asked whether the amazing pictures are Photoshopped. She laughs quietly as she insists they're 100% real.

    The picture of two men having coffee took 50 minutes to create, with the men receiving oxygen from standby assistants around every three minutes.

    "On the way back up, we were holding onto the table during our decompression (减压) stop in the strong current (水流)—it was quite a scene."

    The underwater models made an 11-minute stop on the way back to the surface, making sure they didn't rise too quickly and suffer decompression sickness—which can cause deadly blackouts (眩晕).