1. What is the passage about?

->..............IT'S ABOUT REDUCING POLLUTION....

2. Why is the pollution problem complicated?
Beacause  much pollution is caused by things that benefit people.

3. Do factories discharge a lot of the material that pollutes the water?

->....................................YES, THEY DO...................................................................................

4. What would people have to do if they want to reduce pollution?

->.....people would have to stop using many things that benefit them  if they want to reduce pollution​