A community in Guyana noticed that fish populations in a nearby river declined sharply after a bauxite processing plant began operations upstream. Which type of pollution is MOST likely responsible for this decline?

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Question

A community in Guyana noticed that fish populations in a nearby river declined sharply after a bauxite processing plant began operations upstream. Which type of pollution is MOST likely responsible for this decline?

Accepted Answer

Thermal pollution from cooling water discharge — Award 1 mark for recognising that heated water discharge reduces dissolved oxygen levels, harming aquatic life. B is incorrect — noise pollution affects terrestrial organisms more than fish. C is incorrect — light pollution does not significantly impact fish survival. D is incorrect — bauxite processing does not produce radioactive waste.

Answer

Noise pollution from machinery

Answer

Light pollution from night operations

Answer

Thermal pollution from cooling water discharge

Answer

Radioactive pollution from ore processing

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