ANSWER:in my opinion the action of someone trowing rubbish into the river is completely because throwing plastic bags into the river can pollute the river and cause air pollution arround the shcool. the impact are following:
# Reduced availibility of clean water
#the river become dirty and smelly
#pillng up of rubbish of the bottom of the river
#flood
#decreased oxygen levels in the water
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NOT ANACUEPTABLE:reduced availability of clean water river become dirty and smelly accumulation of rubhis of the bottom of rivers de crease in oxygen levels in the water.