हवा में मौजूद बिना जले कार्बन कणों जैसे निलंबित कणकीय पदार्थ (suspended particulate matter) मुख्य रूप से निम्नलिखित में से किस स्वास्थ्य समस्या का कारण बनते हैं?

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?