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.

    I had been in the city for some time and was coming home. I missed my boat and decided to travel on an old ship. I knew that it would not be a comfortable journey but I had no time to wait for another boat.

    Hardly had we left the port when I saw the dog Gulliver, the captain's favourite dog, for the first time. What a big dog it was! I had never seen one that could frighten me so much!

    On the third day the ship caught fire. Nobody tried to put it out. The ship began sinking and all the men rushed to the life-boats. I saw no chance of getting away in a boat. Suddenly I remembered there was a life-raft on the ship. I had no time to lose, so I immediately rushed towards the raft and pushed it overboard.

    In jumping down onto the raft I hurt myself badly and was unconscious for some time. When I came to, I found there was no sign of a life-boat. Every man who had been on board the ship must have gone down with her. I was the only one who was saved.

    The I saw Gulliver was coming fast towards the raft. He struggled a long time before he managed to get onto it. I wanted to push him back into the water but did not dare to move. The dog shook himself, went to the other end of the raft and lay down. I didn't dare to sleep that night. I must watch him. In the moonlight I could see his eyes were open. He was watching, too.

    Yesterday I work up to the sound of music on my couch in my fifth floor apartment downtown. I couldn't possibly tell you what song was playing because my monologue of things to do that day had already begun. My thoughts ranged from what deals needed my attention today to what is the meaning of life. I felt as if it was going to be one of “those days”.

    After taking my son to school and glancing at my calendar, I noticed I was meeting my 85-year-old friend Harry. I remembered that we first met at a glass shop. I needed a new window and he was talking to the store clerk about his glass fireplace insert needing replacement. As I stood behind him in line, I found not how this old man funny and compassionate at the same time. By the end of his discussion I was so entertained that I decided to drum up a conversation with him. That was how our friendship began. I later learned this gentleman was originally from the mid-west and grew up on a farm. At 17, he joined the army and travelled the world until his late 40's. After the retirement, his wife passed away and now he lives alone in his three-bedroom home.

    We met at the appointed time. I promised to take him to lunch anywhere he wanted to go and he said, “I am a simple man; let's go to Taco Bell. Furthermore I don't need a pat on the back because it is only 18 inches away from a kick in the rear.” We both laughed as we got into the car.

    As we pulled into the parking lot of Taco Bell, Harry jumped out of the car and told me, “I have to go into the donut(甜甜圈) shop next door before going to Taco Bell.” Of course I agreed and in we went. He immediately walked in and began having a joke with the owner of the shop in his fashion. They bantered as she gave him a dozen donuts and off we went. I couldn't help but ask him, “What are the donuts for?” He quickly replied, “You will soon see.”

    As we opened the door to Taco Bell, the line was very long. It was lunch time. People were on their cell phones. Babies were crying and the waiters looked stressed and burnt out. Harry and I were waiting in line chatting about nothing until we reached the front of the line. As he walked to the counter, all the waiters began smiling. He placed the box of donuts on the counter and said, “These are for you and other staff.” Instantly, the mood in the restaurant changed. This single act of kindness made the customers, the waiters, the kids and even me take a look internally and ask: when was the last time we did something nice for a stranger?

    What was most amazing to me was earlier that morning I wasn't thrilled with my life. It felt like it was just another day. Watching this gentleman spend 6 dollars on donuts and provide them for the staff in a packed restaurant at the lunch rush hour changed my outlook on life. If you don't believe me, try it yourself. Take the approach in life that you make an effort to do the little things in order to make people feel appreciated on a daily basis. You will see that your life will be better and you will have less of “those days” I was talking about earlier in this article.

    Are you sick of going to bed late and waking up tired? Then grab your hiking boots and a tent. A new study suggests that camping in the great outdoors for a couple of days can reset your body clock and help you get more sleep.

    The body clock is an internal system that tells our bodies when it's time to go to sleep and when it's time to wake up. Scientists track this clock by measuring the amount of melatonin (褪黑激素) circulating in a person's blood at any given time.

    In a healthy sleeper, melatonin levels rise a few hours before bedtime, stay high through the night, and then settle back down when it's time to wake up.

    In our modern society, however, most of us stay up many hours past sunset and would probably sleep in many hours after sunrise if we could. And the trouble is, your melatonin levels may still be high when your alarm clock goes off in the morning, which leads to fatigue. It may also have other health consequences as well, such as diabetes (糖尿病), overweight and heart disease.

    Professor Kenneth Wright of the University of Colorado in the US wanted to see if our body clocks can be reset by a short stay in nature. His team recruited (招募) fourteen physically active volunteers in their 20s and 30s. Nine went on a weekend camping trip, while the other five stayed home. At the end of the weekend, the researchers reported that in just two days, the campers' body clocks had shifted so that their melatonin levels began to rise more than an hour earlier than they did before they left on the trip. By contrast, the body clocks of the group that stayed home shifted even later over the course of the weekend.

    “This tells us we can reset our clocks fast,” Wright said.

    Therefore, if you want to change your sleep patterns you could try to increase your exposure to natural light during the day and decrease the amount of artificial light you see at night. And if that doesn't work，there's always camping.

    I was born in England, but I am an American. Americans like to travel on their yearly holiday. Today, more and more travelers in the United States are spending nights at small houses or inns (客栈) instead of hotels. They get a room for the night and the breakfast the next morning.

    Rooms for the night in private homes with breakfast have been popular with travelers in Europe for many years. In the past five to ten years, these bed­and­breakfast places have become popular in the United States. Many of these America's bed­and­breakfast inns are old historic buildings. Some bed­and­breakfast inns have only a few rooms; others are much larger. Some inns do not provide telephones or televisions in the rooms; others do.

    Staying at a bed­and­breakfast inn is much different from staying at a hotel. Usually the cost is much less. Staying at an inn is almost like visiting someone's home. The owners are glad to tell about the areas and the interesting places to visit. Many vacationers say they enjoy the chance to meet local families.

    From ancient stories to modern researches, the label（标签）attached to being left-handed is undeniable. Left-handed people, or "lefties" as they are often called, are generally believed to be good at art — Leonardo da Vinci, Picasso and Michelangelo are all left-handed.

    Our brain is divided into two parts: the left hemisphere(大脑半球)and the right hemisphere. The left hemisphere, linked to logic and analysis, is responsible for the right side of the body. The right hemisphere, linked to creativity and imagination, controls the left side of the body. So, people tend to believe lefties are controlled by the right side of the brain, and are more creative than right-handers. Some also think that lefties may not be as good as right-handers in mathematics and problem-solving skills.

    However; a recent study carried out by scientists from the University of Liverpool in the UK and the University of Milan in Italy proved this theory wrong. The study involved(涉及)more than 2,300 students in Italy aged between 6 and 17 years old. They were asked to complete several mathematical tasks of different levels. It turned out the left-handers outperformed the others when the tasks involved difficult problem-solving. This pattern was particularly clear in male adolescents. However; when it came to simple arithmetic, there was no difference between left-handers and right-handers.

    It was also discovered that those who are "severely" right-handed performed less well in all the experiments compared to "medium" right-handers and left-handers.

    "Taken together, these findings show that handedness does influence abilities to some degree," the study's authors wrote. However, "handedness is just an indirect expression of brain function," wrote psychology professor Giovanni Sala from the University of Liverpool in the UK, the lead author of the study. Sala also noted that only one third of people with a highly-developed right side of the brain are left-handed. It means that there are lots of right-handed people with a similar brain function as left-handers.