在現實生活或工作學習中，大家都不可避免地要接觸到作文吧，作文要求篇章結構完整，一定要避免無結尾作文的出現。作文的注意事項有許多，你確定會寫嗎？下面是小編收集整理的大學英語作文：Cancer and Environment-癌癥與環境，歡迎大家分享。
there are two main causes for cancer: heredity and environment. we can do nothing to change our heredity, that is, the basic physical characteristics that arepassed on to us by our parents. however, we can do a great deal to control our environment, which may account for eighty to ninety percent of all cancers.
enviromnental pollution can be divided into two kinds: personal and impersonal. personal pollution may be defined roughly as unhealthy habits such as smoking, drinking, and eating the wrong foods. clearly, with enough will power we can control this personal environment.
impersonal pollution, on the other hand, refers to those things which are beyond our individual control. one eample would be indus trial pollution, which is very hard to control because of the epenses that are needed. the american automobile industry, for eample, resisted the law requiring smog-control devices because il feared the added epense would reduce profits. nevertheless, some laws protecting the environment have been quite successful in reducing pollution.
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