सुरक्षित और किफायती निपटान के लिए जैव-चिकित्सीय ठोस कचरे (biomedical solid waste) का प्राथमिक पृथक्करण किसके आधार पर किया जाता है?

If sewage water with a very high BOD is directly discharged into a river, the most immediate consequence would be:

Which combination of pollutants is primarily associated with raw, untreated domestic sewage discharge?

What is the primary ecological consequence of thermal pollution caused by discharging heated industrial effluents into natural water bodies?