1999英语一考研作文 Population Growth

 

As is graphically portrayed by the diagram above, the American population was soaring from 1800 to 1990, while the numbers of the species were sharply decreasing from 1600 to 1900. How detrimental the decline of the species diversity is! Undeniably, U.S. ecosystem in that period had been deteriorating, and meanwhile, the nature is warning us that humanity would pay dearly for those behaviors of destroying the environment.

It is not uncommon that far too many folks are not aware that preserving ecosystem really does matter much, which would contribute to grave consequences if the current situation is persisting. Environment protection links to everyone worldwide; consequently, individuals are under the imperative to regard ecosystem preserving as their own obligations. It isuniversally acknowledged that these days has been witnessing a series of uncivilized behaviors that are not profitable to our ecosystem, that is, there are a disheartening quantity of people who are violating the moral principles to hurt our ecosystem in an attempt to

meet their unabashed greed.But, there are also, surprisingly, a heap of

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