We live in the world every day. We eat food, drink water, wear clothes, watch TV, use computers and so on. We are producing waste every moment.
Generally speaking, there are four sorts of waste. They are material waste, organic waste, inorganic waste and poisonous harmful waste. Now, we are going to talk about each sort of waste one by one.
Material waste: it means the waste of substance or things from which something else can be made. For example, people throw away the used metal products and buy a new one, so the old metal waste accumulates. At last, they become waste. For example, when people finish reading newspaper, the paper will become waste. When the glass is broken, it also becomes waste. Nobody wants to use a broken window or drink with a broken glass or wear a pair of broken glasses. Once it is broken, it becomes waste. The rate of using plastics is increasing day by day. People use plastic bags because they are convenient. When they get home, they throw the plastics way, paying no attention to the environment. The more convenience plastics brings to us, the more plastic waste is produced. This is called white pollution as most plastics are white. Some of our products we use every day are made of rubber, just like the tyres and the bottom part of our shoes. Its true that rubber plays an important role in our life. However, it also brings us some trouble when it has been used for a long time and becomes old. The old tyres become waste because it cant break down by nature. This is really a big problem.
Organic waste: it refers to waste from living things, including waste from animals, plants and people. Some parts of vegetables are thrown away as waste because they dont taste good. In the past, people cooked their food using burning coal, so there left the burned coal, which is useless, like the thrown vegetables. All this sorts of waste contain organism, so it is called organic waste.
Actually, we also have inorganic waste, the opposite to organic waste, including building waste, broken pottery and china, and cinder.
The last part is harmful and poisonous waste, such as used batteries, electrical apparatus and medical supplies. Computers and TV sets are one part of electrical apparatus. You see, the old electrical apparatus can set off some dangerous rays and make the soil harder, even damage the under ground water. Mobile phones are as dangerous as computers and TV sets. As we know, X-rays can be used to examine patients, but the X-rays machines are dangerous when they are thrown away without any treatment. They cant be used to treat the sick, but they still can give off rays. For the normal people, they can be dangerous. So, we must think about this problem.
As waste has four sorts, we can sort them into each sort that they belong to. Its convenient to treat them after they are sorted. Then we can deal with them sort by sort. We have thought out some methods like storing them in order to change them into plant food, or burning them in a huge stove and use the heat to make electricity. For the first way, the change rate is much too low and it may pollute the under ground water. For the second one, of course its wonderful if its easy to be tried out. But to build such a huge stove will cost too much. Not a good method. Now you see, treating waste is not an easy job.
From what has been discussed above, we can do something to our homethe earth. We should make full use of things. At the same time, wed better reduce its harmful effect as much as possible.
We can do from the basic of waste. Thats to say, we can reduce the production of waste, and reuse and recycle them as much as we can. Take material waste for example. Nearly all of them can be recycled and reused. And, we should call for using things made of paper instead of plastics so as to protect our environment.
Protecting the environment is not one persons duty; it depends on all of us. What can we do? Maybe a dozen..
In a word, use what can reuse as much as possible. Remember, environment protection is not ones duty!
小升初英语单词速记方法
2010小升初 重点中学考试的侧重点就是“语法”
小升初英语名师课堂实拍集合贴
小升初英语课上的游戏是如何设置的?
小学生学英语千万别走这样弱智的道路(组图)
为什么孩子不能按时完成英语作业
小升初英语时间和日期表达训练
小学英语作业设计 这样写作业英语学得好
小升初英语的最有效课堂听课学习法
小升初英语语法点 反义疑问句如何掌握牢固
过来人写给家长的建议 小升初英语中小衔接很重要
小学英语课堂中朗读的重要性 帮助学生记忆词汇
2011小升初大事件说明
小学生英语这样教、这样学是在糊弄谁?
小升初英语口语练习必备话题 爱好等集锦
名师分析:小升初英语 状语从句考点
2010小升初英语必考考点 祈使句疑问句记忆顺口溜
我学了30年英语竟不如12岁的女儿
小升初英语选词填空 牛刀小试附答案
小升初英语目标班是如何讲解非谓语动词的?
小学英语单词学习 如何用儿歌巧记反义词
小学生就在学校学习英语 应对小升初够不够?
学而思五一期间各年级课程调整通知
小升初英语阅读必杀技 创设故事情境
小升初孩子难搞定的英语单词 愁眉不展的 did
小学英语期末复习方法 注意这4点最有效
2011小升初英语“如何抢占先机”——写给五升六的娃们
小学生学英语应该注重培养兴趣和习惯
家长必看:英语教学实情令人担忧(图)
小升初家长给大家的圣诞祝福 英文
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |