Pollution refers to contamination of Earth’s environment with materials that interfere with human health, the quality of life, or the natural functioning of ecosystems. There are two main categories of pollutants. The biodegradable are materials, such as sewage, that rapidly decompose by natural processes. The nondegradable are materials that either do not decompose or decompose slowly in the natural environment.
- pollution [pəˈluʃən] n. 污染(作用)
- contamination [kənˌtæmiˈneiʃən] n. 污染，污物
- interfere [ˌɪntəˈfiə] v. 有害于(with)
- function [ˈfʌŋkʃən] v. (机器、机制等)运行，发挥作用
- ecosystem [ˈi:kəsistəm] n. 生态系统
- pollutant [pəˈlu:tənt] n. 污染物
- biodegradable [ˌbaiəudiˈɡreidəbl] adj. 可以进行分解和还原处理的
- sewage [ˈsjuidʒ] n. 阴沟污物；污水
- decompose [ˌdi:kəmˈpəuz] v. 分解，分析
- nondegradable [ˈnɔndiˈɡreidəbl] adj. 不可以进行分解和还原处理的
