cancer and environment 癌癥和環(huán)境

There are two main causes of cancer: heredity and environment. We can do nothing to change our heredity, that is, the basic physical characteristics that were passed on to us by our parents. However, we can do a GREat deal to control our environment, which may account for 80-90 %of all cancers.

Environmental 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 example would be industrial pollution, which is very hard to control because of the expense involved. It would be expensive in terms of profits and perhaps jobs. The American automobile industry, for example, resisted the law requiring smog-control devices because it feared the added expense would reduce profits. Nevertheless, some laws protecting the environment have been quite successful in reducing pollution.

原因有兩個：癌癥的遺傳和環(huán)境。我們可以做什么來改變我們的遺傳，即，被傳遞到我們的父母的基本物理特性。然而，我們可以做很多事情來控制我們的環(huán)境，這可能占80-90%的癌癥。

環(huán)境污染可分為兩種：個人和非個人的。個人的污染可能是定義大致為不健康的生活習(xí)慣，如吸煙，飲酒，吃錯食物。顯然，有足夠的意志力，我們可以控制自己的環(huán)境。

客觀的污染，另一方面，是指那些超出我們的個人控制。一個例子是工業(yè)污染，這是很難控制，因?yàn)樗婕暗降馁M(fèi)用。它將在利潤方面是昂貴的和可能的工作。例如，美國汽車工業(yè)，抵制法律要求煙霧控制裝置是擔(dān)心增加的支出將減少利潤。然而，一些法律保護(hù)環(huán)境減少污染已經(jīng)相當(dāng)成功。