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As a class assignment you have been asked to write a description of how this plastic is produced and then broken down. Using
As a class assignment you have been asked to write a description of how this plastic is produced and then broken down. Using
admin
2016-08-02
95
问题
As a class assignment you have been asked to write a description of how this plastic is produced and then broken down.
Using the information in the diagram, write a description of the cycle.
You may use your own knowledge and experience in addition to the diagram.
选项
答案
The diagram shows in four stages how plastic is produced and then broken down. According to the diagram, in the first stage, cereal crops are harvested and taken to a factory. Next, in the factory, giucose is extracted from cereal crops. Stage three of the process is when the giucose then passes into a bacferiai fermentation chamber, where the process of fermentation produces a type of plastic called PHB polymer. This can be used to make piasfic bottles to hold shampoos and detergents. When these plastic bottles are thrown away, they may be disposed in three ways. First, they may be recycled. Another way is that they may also be filled in land. In this way, the oxidation products from the landfill sites are released slowly into the atmosphere. Other discarded bottles are burnt or biodegraded and send out carbon dioxide info atmosphere. Finally, cereai crops require carbon dioxide in order to grow, and these crops are used in the manufacture of the new piasfic. Thus, the process diagram illustrates the cycle of the plastic.
解析
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