题目：
At various times in the geological past, many species have become extinct as a result of natural, rather than human, processes. Thus, there is no justification for society to make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species.
在过去不同的地质时期，许多的物种因为自然作用而非人类行为而灭绝。因此，人类社会为了挽救濒危物种而付出的巨大努力，尤其是以大量的资金和工作机会为代价，这样做是毫无道理的。
正文：
As the problem of ecological becoming more serious, there is much controversy over the issue of whether society should make extraordinary efforts to save endangered species. Somebody claims that we do not have to spend a great cost in money and jobs to do that result from that at various times in the geological past, many species have become extinct because of natural. However, I do not agree this argument.
Indeed, there are certain species would become extraordinary that is not relevant to human beings, however, which cannot be the excuse for society to shirk the responsibility to protect them. The Darwin's theory of evolution tells us that only the species which suit for the natural will live in the society. And there is also a saying in China that the fittest survive. To balance the ecological, natural itself will choose the best species that is useful, which will not destroy the biological system. However, since the human beings appeared, especially as the contemporary society developing, the extinction of the species is accelerated. This acceleration makes seriously influence on the natural, and destroys the balance of the geological. There is a mass of data showing that how many species disappeared every year, every day, every hour, even every second, which makes people extremely amazed. In recent years, the largest animal in the world--whale is catched and killed at a big quantity which used to making the whale oil and produce food for people's pets. As a result from human being's vanity and desire, many precious species are going to extinct. Undoubtedly, human being should be responsible for the destroys on the natural.
Additionally, keeping the balance of the geological system is important for human beings to live in the natural. We know that there are innumerable chains of biology in the geological, and human beings are one species in one of the chains. Every minute,we are absorbing energy from natural. Our foods come from different other species.Now the species are disappearing so fast that it is very impossible that the next species which extinct is the most important food source of human beings. Moreover, our body is benefit from innumerable ecological beings. Sometimes, certain boring insects (such as the mosquito, fly and so forth) are likely to have no benefit for us, and we must believe that we will live better if the mosquito all over the word disappeared. However,there will be a great number of antibodies that are poured into the human beings' body as a result from the mosquito biting us which increase our immunity from diseases.Then, spend a cost in money and a job to save endangered species is our responsibility.
In summary, besides human beings, every species in the natural are all equally. We are advance just on the intellect and emotion. We have no right to destroy other species. If we do that, we will be punished by the natural. So we should make our best efforts, no matter how great cost in money and jobs we have to pay, to save endangered species because the development of human beings accelerates the extinction of species.
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