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Biodegradable Polymers

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Biodegradable polymers are environmentally friendly. Write an article for your school magazine to promote more extensive use of biodegradable polymers in Hong Kong. As many of you would know, Hong Kong is heavily polluted and solid waste pollution remains a serious problem to be solved. In Hong Kong, an average of 23000 tonnes solid waste were produced per day, and this figure is obviously increasing. Among all the solid wastes that we dispose of daily, non-biodegradable plastics are one of the kinds that are the most difficult to handle and pose serious threats to our environment. But do you ever think of any solutions to this problem? In fact, everyone can play a part in protecting our Earth from plastics by using biodegradable polymers as substituents. ...read more.


Also, the polychlorinated hydrocarbons in plasticizers decompose in the stratosphere to produce free radicals chlorine atoms, which is a catalyst to break down ozone. C. Economical problems The disposal of plastics requires a long term investment and the pollution problems caused by plastics also need to be solved by lots of money. These are financial problems. Furthermore, plastics use up the valuable space in landfills, which can otherwise be used for other purposes such as property development. What actually are bio-degradable polymers? As non-biodegradable polymers threaten our environment, more extensive use of environmentally friendly biodegradable polymers in Hong Kong should be promoted. But what actually are biodegradable polymers? And what are their advantages over non-biodegradable ones? Plastics normally undergo extremely slow degradation because the enzymes in micro-organisms tend to attack only at the ends of the polymer chains. ...read more.


The very small pieces left over have a large surface area which greatly speeds up their biodegradation. Why using biodegradable polymers? The answer is simple - they are environmentally friendly! Since they are biodegradable, they impose no long term disposal problems and thus produce no pollution consequences. Unlike non-biodegradable ones, biodegradable polymers degrade usually within one year, which is much faster than the ordinary ones. They do not remain in the environment forever. Another important reason is that it is increasingly easier to each biodegradable polymer and they are used to produce more common materials. Examples include six-pack beverage rings, trash bags and disposable diapers. These products are chosen because they entangle wildlife, make up a high percentage of litter, or cause pollution. Act now! So up till now, I believe you understand the significance of biodegradable polymers to our worsening environment. To create a better environment for our next generation, use biodegradable polymers from now on! ...read more.

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Response to the question

The response to the question is explicit and well thought out, the fact that the student has thought logically about the reasoning behind the argument for using bio-degradable plastics. Planning what you are going to write before you do is ...

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Response to the question

The response to the question is explicit and well thought out, the fact that the student has thought logically about the reasoning behind the argument for using bio-degradable plastics. Planning what you are going to write before you do is key in any essay, especially if there are many points you want to make as sometimes you can get mixed up.

Level of analysis

The analysis given by the student is excellent, this is what gave it the 5 star rating. The fact that the arguments made are backed up with reasoning that has a solid scientific base. The way the essay is broken down into sub headings allows for the examiner to find the points that are worth marks. The use of scientific language is executed very well. It can be tempting when writing a scientific essay to put words in for the sake of sounding clever, but using words sparing sometimes has a greater effect.

Quality of writing

The grammatical and spelling sides of the students writing are fine with the exception of one or two grammatical errors. The layout of the essay is at the level that is expected at GCSE, with the layout being clear and easy to follow. The one way that the student could have improved the language would had been to explain a few of the key terms so that someone who had a very limited knowledge of the subject could follow it. This essay shows a perfect example of how to layout and word an essay.

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