issue121 METTLE小组第三次作业 提纲 by imagic80

imagic80UID: 2342633

121"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."
地球上不同的时代，很多物种的灭绝是自然进化的结果，而非人类所为。所以，社会花大力气，尤其是金钱和人力上的，去拯救濒临灭绝的物种是没有道理的。

提纲一：上面的statement可以分成两部分，a很多物种的灭绝不是人类行为造成的；b 花大的财力物力去拯救濒危物种没有价值。
1、            必须承认有些物种的灭绝的确不是人类行为所致（dinosaurs，doodoo bird，mammoth），而是气候剧变和全球性灾难造成的。但是，自从人类控制地球，a偷猎whale和tiger等，b污染，加速了很多物种的灭绝。
2、            不去拯救濒危物种是可笑和不负责任的。A，人类是地球上最高级的物种，有责任好好保护地球。B，保护生态平衡，就是保护人类自己的利益。C，拯救濒临灭绝的物种也可以创造价值。
提纲二：
1、            natural process did eliminate some species through natural selection; however, it did not break the balance of the ecosystem.
2、            Due to human processes, including pollution and extreminatory exploitation of natural resources, our natural environment is being threatened, and the extinction of rare species has been accelerated.
3、            Since the diversity of species is beneficial for human beings measures must be adopted to protect endangered species.