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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. It’s 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 can’t break down by nature. This is really a big problem.
