With the development of scientist, we have air ,car,train and so on. It's convinet for us ,we can go further than former. But as you know, we paid for our action . sea level has raised , air become badly.Chemicals were poured into river , caused sealife lost its life. I belive in punished next is human beings. So I think we should protect environment from pollution.It's our duty. It's no need drivering. we can ride a bike. Riding can benefit us.For example, while riding , we can see beatiful flowers and trees. we can know something we don't know.we can chat with everyone, too. The important one ,riding a bike is enery saving and benefit our health. Besides,It's best way of low-carbon life.
With the development of technology, we now have aeroplanes(?), cars, trains etc. Life become more convenient for us, we can go a lot further than before. But as you know, we paid for our action. Water level rises and air pollution become more and more serious. Chemicals were disposed into the rivers and a lot of marine animals were killed. I believe that human beings will be punished for what we have done some day. I think that we should protect the environment as it is our responsibility. Instead of driving, we can ride a bike. Riding can benefit us in different ways, for example, we can enjoy the beautiful scenery on the way and may discover something new. We can chat with our friends, too. And the most important is, riding a bike can save energy and benefit our health, it is also the best way of having a low carbon life. 你参考一下吧(笑