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dolphins if they went extinct it would be caused by

*pollution (heavy metals, sewage, PCB, rain water drains, plastic, co2 emissions)

*overfish (80% of all fishery's are over fished and kill many dolphins by net so there's lack of prey and population decrease)

*habitat loss (marine farming, tidal power and areas with a lot of boating activity)

all these factors are the worst threats a dolphin has if we do not stop doing this they will go extinct. this could cause a collapse in the food chain but i do not believe from fish population increase as populations of fish are only getting smaller and smaller.

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13y ago

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