Answer:
Downstream, along the river is vague and middle of town makes no sense, upstream would mean that the pollution would run right past the town and cities and could pollute the town's and cities
Ontario went to that place for a science field trip
Answer:
sorry can't understand your language
They can enter your blood stream (via breathing/ingesting) and once in your bloodstream they can enter cells and mutate your dna, which can cause cancer/birth defects/ reproductive harm
D. Organic compounds contain carbon and inorganic compounds do not.