关于水污染的源头及处理和解决方法的一份英文课堂ppt
Point and Nonpoint SourcesNONPOINT SOURCES
Rural homes
Urban streets
Cropland Animal feedlot Suburban development POINT SOURCES
Factory
Wastewater treatment plant
Fig. 22-4 p. 494
water pollution(4)
2020-12-24 16:54
water pollution(4).doc
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