NEBOSH Environmental Diploma Practice Questions - NEBOSH International Diploma In Environmental Management Exam

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A lake receiving run-off from intensive agriculture develops dense algal blooms followed by fish kills. Which sequence correctly describes this eutrophication process?

Pesticide accumulation poisons algae, decomposition releases toxins, fish are poisoned Nutrient (N and P) enrichment stimulates algal growth, algae die and decompose, microbial decomposition depletes dissolved oxygen Sediment run-off blocks sunlight, plants die, pH rises and kills fish Thermal pollution warms the water, oxygen solubility falls, algae proliferate in warm water

Correct Answer:

Nutrient (N and P) enrichment stimulates algal growth, algae die and decompose, microbial decomposition depletes dissolved oxygen

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