एक तालाब में शैवाल की अत्यधिक वृद्धि तालाब के लगभग सभी अन्य जीवन रूपों को मार देती है, क्योंकि यह:

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?