por STEPHEN CLARK hace 3 años
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por Joel Martinez
por Rebecca Regino
por Anson Chung
por Sabeh Ayoun Abdul Rahman
Average levels in rivers worldwide - 0.1 - 3 mg / L
Average levels in rivers worldwide - 264 mg / L
severely below average
Average levels in rivers worldwide - 250 mg / L
Mostly does not meet average levels
Average levels in rivers worldwide - 0.01 - 0.02 mg / L
Severely above average
Average levels in rivers worldwide - 40 mg / L
Average levels in river - 50 - 270 mg / L
Average levels in river - less thatn 20 mg / L
severely above average
Average levels in river - 1-135 mg / L
Meets average levels
Satellite imagery of the Yangtze River (barely distinguishable from Earth's terrain
This causes population to decrease dramatically
Reduced population decreases the health of the ecosystem