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As we all know, some plants and animals are facing the danger of extinguish. Whether to spend much money and power on saving them is a problem. In my view, no matter to save them or save money all have their own rational reasons. In my opinion, it is very good for us to protect…

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Nowadays, with the growing trend of publicity, people virtually live in large cities. The issue of whether a zoo has a useful purpose arouses much controversy among people with different social strata. While some people extol the virtue of maintaining animals in zoos, there some others holding the view that there is no useful purpose…

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Some people may argue that protecting specific species which are on the edge of extinction is not proper because it is unnatural to save species which will extinct as a result of natural selection. They also may state that intervention by human may have bad effect on ecosystem. However, I personally believe that it is…