issue121处女作，希望得到高人指点，以助我提高

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这是我的第一篇issue文章,自己感觉写得很艰巨，水平很差，但是不知道问题在哪？希望得到高人的指点。帮我指出本文的硬伤及以后写作要注意的地方，谢谢！
issue121 our responsibility to save endangered species
"at various times in the geological past, many species have becomne 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 endangeres species."

       It’s not the choice of us human but the Nature to decide who could survive in our common living place. It can’t be avoided that some species are decreasing to endangering. For a long time, there is nothing to do with human when it comes to extinction. However, human beings’ activities or exploit of the Earth do affect many a species’ living circumstance. From this point of view,human beings should take action to save the endangered species at least those whose habitats are seriously damaged.
         I concede that many species are faced up with extinction as a result of natural. Rather than human, processes at various times in the geological past. After all, we human beings’ lives are controlled by the nature. So, we can’t help to deal with the phenomenon of extinction, let alone the willing and motive of human. For example, it’s out of our control that dinosaur died out long time along. In a word, the environment is not all under the monitor of human. On this issue, it makes no sense to get involved into the nature’s choice.
          On the other hand, the assertion of no justification to save endangered species seems unreasonable. This falls on two aspects. In the first place, a lot of species is dying out owing to human’s hunt. For example, the lovely giant panda is most killed for their fur and feather or their organ that can be used as medicine before effective measures are taken. In no time, the number of panda decreases exponentially. Frankly speaking, if someday pandas no longer exit in the earth, human beings must be blamed. Fortunately, our ecologists realize the urgency of this trend in time. Thanks to the timely enforcement steps, the cute pandas survived. Unluckily, while pandas are saved, others animals run into the eyes of hunter. As I see it , in order to get out of the vicious circle, our government ought to lay out more law and regulations to ban the illegal hunter.
               Besides, human indirectly destroys the habitat of a lot of species. Maybe, we are not on purpose. But other animals also enjoy the equal right to share the living space. How could we get deprived of others of habitat .we human beings get angry about the imagination of aliens, and we are preparing to be equipped with advanced arms for fear of the invasion of aliens. So do animals in spite of their feeble strength. The most intellectual and emotional does human establish themselves as. Accordingly, we are to leave a habitat far away from pollution and invasion. What’s more, efforts are to be made urgently to make up for the vicious consequence of greedy footprint.
                In the final analysis, it is useless and of no means to fight against the nature’s choice. Thus, there is no justification for society to make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species. Yet, harms done to species should be made up for. What is worth rejoicing, we are on the way to stop the trend. (514)