阅读下面的短文，并从下面的文本框中为本文选择恰当的段落大意。

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the rivers, or on the grassland, you should know that your sport of choice might have great influence on the environment.
② 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 kinds of harmful things and a lot of energy are used to keep its courses(球场)，This leads to serious environmental problems. For example, in Portugal and Spain, golf is considered to be the most important reason for water shortage(短缺）io some areas.
③ There are many environment-friendly sports. Power walking is one of them that you could do today. You don't need anything special but a good pair of shoes; and you don't have to worry about nature and your money. Simple and free, power walking -can also keep you fit. If you often walk, it will be good for your heart and bones.
④Nowadays more and more people choose to play "green sports". They play sports outdoors, in the countryside or other open spaces. There is no special things needed. And best of all, it's free.

    The Maori people of New Zealand believe that the world began in darkness.

    They say it was dark because Rangi, the sky father, and Papa, the earth mother, were lying together, keeping out of the light.

    Rangi and Papa had many children who were all gods (神). Their children did not like the darkness, so one of them, Tane, the god of the forests, made his mother leave his father. After that, the sky stayed far above the Earth, and let the light in.

    Later, Tane was living on the Earth. He wanted to have a wife. There was no woman around, so he made one from sand. He breathed (呼出) life into her, and she became the first human(人类).

    As Tane breathed life into his wife, he knew that the breath of life would one day leave her. So it was that humans were not like gods — they could not live all the time.

A simple honk（汽车喇叭声） from the bus is one part of a secret code（代码） between the driver and students living in a far—away village in Wanzhou district，Chongqing.

Seeing a schoolbag hanging from the doorknob of an old house along the road，the bus driver drives toward the roadside and makes a honk to answer the "code".Then a boy runs outside，takes the schoolbag，and gets on the bus.

The boy's parents work far from home，leaving him in the care of his grandmother.The boy is in the ninth grade this year.He comes home every Friday and goes back to school in the city every Sunday.To make the journey easier，he and the driver，Cheng Lin，have developed a special "code".When the boy's schoolbag is hanging outside the house，it"tells" Mr Cheng，"Today，it's time to go back to school.I need to catch the bus."

The parents of the boy are deeply touched when they know this.They show their heartfelt thanks to Mr Cheng and feel happy that there is someone taking care of their son while they are away.

Mr Cheng has been driving the Luotian to Wuqiao Nan Station bus for many years.There are many left—behind children on this bus line.Realizing the importance of his role in their lives，he has paid more attention on Fridays and Sundays.

The driver's kindness to the boy touches the hearts of many people.One wrote online，"He is a good driver.The schoolbag is their code，packed with love inside."