导读：作文标题：Pollution关 键 词：Pollution小学五年级450字字    数：450字作文本文适合：小学五年级作文网提示:我们欢迎所有使用和拷贝我们...

作文标题： Pollution
关 键 词： Pollution 小学五年级 450字
字    数： 450字作文
本文适合： 小学五年级

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本作文是关于小学五年级450字的作文，题目为：《Pollution》，欢迎大家踊跃投稿。

When we read newspapers, we often come across the word pollution. This word was not familiar to the people some decades ago. But now, it is a serious threat to us because.it means the poisoning of the air, seas, rivers and lands, which would do harm to our health.　　There are many factories that bring pollution to us. We can not have fresh air in the morning. This is mainly because of the poisonous smoke coming from factories, especially chemical ones. In rivers, seas and oceans, there are industrial wastes. Some factories just throw their wastes into seas or let them flow into rivers. When people drink the water from such rivers, they get poisoned. Besides, there is rubbish from ships and when sometimes an accident occurs in an ocean, oil flows out from tankers.　　On land, the accumulation of rubbish in the streets may dirty the city and ruin our health. This is mainly due to the improper disposal of rubbish by people.　　If we do mot fight against pollution, surely one day all of us will be killed. Some people like to put the blame on the industrial revolutions. On the contrary, the pollution problem will be solved only with the help of modem science and technology.