The world itself is becoming much smaller by using modern traffic and modern communication means. Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

    Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true. Man is now slowly polluting the whole world.

    Air pollution is still the most serious. It's bad for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

    Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air.

    Pollution by carbon dioxide is now the most dangerous kind of air pollution. It is caused by heavy traffic. It is true that if there are fewer people driving, there will be less air pollution.

    The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise in population at the same time.

    When I spent the summer with my grandmother, she always set me down to the general store with a list. Behind the counter was a lady like no one I'd ever seen.

    “Excuse me,” I said. She looked up and said, “I'm Miss Bee.”

    “I need to get these.” I said, holding up my list. “So? Go get them. ” Miss Bee pointed to a sign. “There's no one here except you and me and I'm not your servant, so get yourself a basket from that pile.”

    I visited Miss Bee twice a week that summer. Sometimes she shortchanged me. Other times she overcharged. Going to the store was like going into battle. All summer long she found ways to trick me. No sooner had I learned how to pronounce “bicarbonate of soda” and memorized its location on the shelves than she made me hunt for it all over again. But by summer's end the shopping trip that had once taken me an hour was done in 15 minutes. The morning I was to return home, I stopped in to get some run.

    “All right, little girl,” she said. “What did you learn this summer?” “That you're a meanie!” I replied. Miss Bee just laughed and said, “I know what you think of me. Well, I don't care! My job is to teach every child I meet life lessons. When you get older you'll be glad!” Glad I met Miss Bee? Ha! The idea was absurd.

    Until one day my daughter came to me with homework troubles. “It's too hard,” she said. “Could you finish my math problems for me?”

    “If I do it for you, how will you ever learn to do it yourself?” I said. Suddenly, I was back at that general store where I had learned the hard way to add up my bill by myself. Had I ever been overcharged since?

    On November 7, Lewis Pugh completed a one-kilometer swim in the freezing waters of King Edward Cove, off South Georgia in Antarctica. He was wearing only his swimming glasses, cap and speedos!

    Pugh is an advocate for our oceans and seas, working to protect these ecosystem with their large diversity of marine life. When asked why he doesn't wear a wetsuit, Lewis says, "I ask world leaders to do everything they can to protect our oceans. Sometimes the steps they need to take are difficult and unpopular. If I'm asking them to be courageous, I must also be. Swimming in a wetsuit would not send the right message."

    It took Pugh about 19 minutes to complete the one-kilometer swim in Antarctica where the water averaged about 1.6 degrees Celsius. He says that his body can only tolerate about 20 minutes in the freezing waters before it starts shutting down. As he swims, his body temperature steadily drops, which in turn causes his muscle control to drop, slowing him down. When he is done with his swim, his support team rushes him to a hot shower and it takes almost an hour for his body temperature to return to normal.

    Doctors and Pugh caution that one must receive months of training to swim in such cold waters. Even expert swimmers who are unused to freezing water can drown within minutes because of the physical shock experienced by the body. Pugh says he trained for six months before this swim.

    This is not the first time that Lewis has swum in dangerous conditions. In 2007, he swam one kilometer in the North Pole to draw attention to the melting Arctic ice due to climate change. In 2015, he swam in the Bay of Whales in Antarctica's Ross Sea as part of his successful campaign to help set up a marine reserve there.

    I was reading these interesting stories behind a group of great logos（商标） in the world. Personally Nike is my favorite one﹣it's so simple. And I liked the stories behind them, which made me forget all other things. McDonald's, Apple, and Mercedes Benz own great logos as well, and they are among my favorites.

    Nike

    In the Greek myth, Nike is the goddess of victory and the source of inspiration for soldiers. This logo represents the wing in the famous statue of the Greek goddess.  Nike's logo was designed by Carolyn Davidson in 1971 for﹩35, and was registered as a trademark in 1995.

    McDonald's

    The logo was designed in 1962 by Jim Schindler to resemble the arch shaped （拱形的） signs on the side of the company's then walk﹣up hamburger stand. Later on, the two golden arches were combined together to form the M. The McDonald's name was added to the logo in 1968.

    Apple

    There are different stories behind Apple's logo. The first logo was a reference to the religious story of Adam and Eve, in which the apple represented the fruit of the Tree of Knowledge. One year later, the second logo was designed in 1977 by Steven Jobs and Ronald Wayne, and it described Sir Isaac Newton sitting under an apple tree. This logo didn't stay long. One year later it was replaced almost immediately by graphic designer Rob Janoff's "rainbow apple",  a rainbow﹣colored silhouette （轮廓） of an apple with a bite taken out of it. And then the rainbow﹣colored apple was replaced by the one﹣colored logo in 1998. It has not been changed so far.

    Mercedes Benz

    The Mercedes Benz logo, which was originally created by Gottlieb Daimler in 1909, consists of a simple description of a three﹣pointed star that represents its rule of the land, the sea and the air. The company was founded by Gottlieb Daimler and Wilhelm Maybach. Mercedes is the name of Maybach's elder daughter, while Benz came as a result of a combination with Benz Cie and DMG in 1926.

The Harbourside Development is one of the world's most exciting places to shop. It's built right on the edge of Sydney Harbour, and there are over 200 shops, selling everything from home­made sweets to the very latest clothes in fashion; from Australian souvenirs to Swiss watches and Japanese cameras.

The Australian Wildlife Park has been specially built to give people an extra close look at Australia's native animals. Have your photo taken with a kangaroo，touch and feed koala bears. There are talks every afternoon about these animals, which are only found in this part of the world. There is also an excellent souvenir shop.

A visit to the Australian Museum is like an adventure across Australia. There are shows on the people and their way of life and the whole continent. Talks and guided tours help to make your visit unforgettable. There's also a café and a good book shop, selling excellent maps.

Taronga Zoo has Australia's finest collection of rainforest birds and sea­life centre which has many of the fish that can be found off the coasts of Australia and New Zealand. Taronga is also famous for its large group of South East Asian monkeys. Fast food can be got at cafés.

How do you kill your time on your way to work? Most of us stare at our cell phones, and refuse to make eye contact with others. We just read, chat with others online or play games online. Or maybe we're using the time between stops to do our makeup, catch up on emails, or read a few chapters of a book. However, Dina Alfasi takes a very different approach.

Each day she has to travel hours on buses and trains to get to her engineering job at a hospital in Israel. Rather than look at her cell phone in silence, she uses one very special way to have connection with strangers. It is portraits of the people she meets on public transport every day that she is taking. The paintings catch those quiet and personal moments of people readying themselves for the day ahead. Some people lean their head against the window and go to sleep, some stare into space and have a daydream, and others sit quietly to read their documents or books. Each picture catches one tiny moment in people's lives, ripe with potential for your imagination. It is wonderful for her to look at someone's commute (上下班) and make up an entire story about the rest of their daily existence, from the father travelling with a baby to the woman welcoming a change.

"What inspires me very much are the little moments that happen every day," Dina told My Modern Met. "My work is to tell stories through a single portrait, and it proves that all you need is just to look around and find those magic moments."