【最新2018】英语六级作文-word范文模板
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英语六级作文
英语六级作文不会写?下面小编献上五篇六级英语作文，感谢阅读。 生存和毁灭(Live and Die)
the history of life on earth has been a history of interaction between living things and their surroundings. to a large extent, the physical form and the habits of the earth's vegetation and its animal life have been molded by the environment. considering the whole span of earthly time, the opposite effect, in which life actually modifies its surroundings,has been relatively slight. only in the present century has one species--man acquired significant power to alter the nature of his world. www?
during the past quarter century this power has not only become increasingly great but it has changed in character.the most alarming of all man's assaults upon the environment is the contaminatien of air, earth, rivers, and sea with dangerous and even lethal materials. this pollution is for the most part irrecoverable. in this now universal contamination of the environment, chemicals are the sinister partners of radiation in changing the very nature of the world, the very nature of its life.
it took hundreds of millions of years to produce the life that now inhabits the earth. given time not in years but in millennia life adjusts,