Subjects: *WATERSHEDS; *WATER supplyYELLOW River (China); CHINA
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Subjects: *HEAVY metals; *SEWAGE sludge; *POLLUTANTSCHINA
Subjects: *HEAVY metals; *INDUSTRIAL contamination; *RISK assessmentCHINA
Subjects: *SEDIMENTS; *TEMPERATURE measurements; *EXTRACTION (Chemistry)CHINA
Subjects: *HEAVY metals; *SOIL pollution prevention; *SEWAGE purificationCHINA
Subjects: *DUST; *AIR pollutionBEIJING (China); CHINA
Subjects: *FACTORIES; *SEASONSGUANGZHOU (China); CHINA
Subjects: *HEAVY metals; *ENVIRONMENTAL quality; *SOILSCHINA
Subjects: *RUNOFF; *POLLUTION; *METROPOLITAN areasCHINA
Subjects: *INDUSTRIAL wastes; *HYDROCARBONSTIANJIN (China); CHINA