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Assessment
What is the primary source of pollutants affecting aquatic ecosystems?
Industrial discharges
Natural sedimentation
Photosynthesis
Surface runoff from forests
Which of the following pollutants is most harmful to aquatic life?
Nutrients like nitrogen and phosphorus
Oxygen
Carbon dioxide
Freshwater
What is the primary impact of heavy metals in aquatic ecosystems?
Bioaccumulation in food chains
Reduction of water clarity
Increased water temperature
Disruption of water flow
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