Climbing Mount Qomolangma, the World's highest mountain, has now become more difficult. The government of Nepal asks climbers to come down the mountain with at least 18 pounds of garbage. That's the average amount of garbage a climber leaves behind on Mount Qomolangma.

    Climbers would leave garbage along the way. This helps climbers keep their bags light, so they would have energy to reach the summit.  The garbage problem in Mount Qomolangma is not new. In 2013, climbers carried down a total of four tons of garbage.

    The new rule came into effect in April of 2014. To make sure it is followed, climbers will have to hand in some money to the officials before they climb the mountain. When they climb back down the mountain, the officials will check them to make sure they bring down the 18 pounds of garbage. If they do, their money will be given back to them.  If not, climbers won't get their money back. Also, the officials won't let these people climb the mountain again.

    In today's world, almost everyone knows that air pollution and water pollution are harmful to people. However, not all the persons know that noise is also a kind of pollution, and that is harmful to human, too.

    People who work and live under noisy conditions usually become deaf(聋的). Today, however, scientists believe that 10 percent (百分比) of workers in Britain are being deafened by the noise where they work. Many of the workers who print newspapers and books, and who weave(织) cloth become deaf. Quite a few people living near airports also become deaf. Recently(近来) it was discovered that many teenagers in America could hear no better than 65-year-old people, for these young people like to listen to "pop" music and most of "pop" music is a kind of noise. Besides(除此之外), noise produced by jet planes or machines will make people's life difficult and unpleasant, or even make people ill or even drive them mad.

    Nowadays the government in many countries have made laws to reduce or control(控制) noise and make it less than 85 decibels(分贝).  In China, the people's government is trying to solve not only air and water pollution problems but also noise pollution problem.

What would people like to eat on their birthday? The answer would 1 different in different countries.

In many countries, people have birthday cakes 2 candles. The number of candles is the3 age. The birthday person must make a wish and blow out the candles. If he or she blows out all the candles in one go, the wish will 4 .

In the UK, people sometimes put a candy in a birthday cake. The child with the candy is 5 .

In China, it is 6 popular to have cake on your birthday. But many people still eat very long7 for their birthday. They never cut up the noodles because the long noodles are a8 of long life. In some places, Chinese people also eat eggs on 9 birthdays. They are a symbol of life and good luck. 

 All of these birthday foods 10 be different, but the ideas are the same. They bring good luck to the birthday person.