1.   The factory pollutes the air and water.

2.   Factories also pollute the Neva River, which runs from the lake through St. Petersburg into the Gulf of Finland.

3.   Factories polluted the cities and exploited women and children.

4.   The Ohio River provides a steady supply of water, but much of it is polluted by factories upstream.

5.   The factory also pollutes the Kishon River with the cocktail of arsenic and heavy metals such as cadmium, cooper and zinc.