water pollution(3)

关于水污染的源头及处理和解决方法的一份英文课堂ppt

WATER POLLUTION: SOURCES, TYPES, AND EFFECTS Water pollution chemical, biological, orphysical change a harmful effect makes water unsuitable for desired uses – Point source: (drain pipes, ditches, sewer lines). – Nonpoint source: (atmospheric deposition, agricultural / industrial / residential runoff)

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库water pollution(3)在线全文阅读。