Water Pollution

12345678910
Across
  1. 3. there are a number of ways to ______ drinking water, but the most effective and least costly strategy is pollution prevention.
  2. 5. these are less effective at diluting pollutants than streams.
  3. 6. protecting our ________ through pollution prevention is the most effective strategy.
  4. 8. one of the leading causes of water pollution is _______ activities.
  5. 9. half of the world’s 500 major rivers are polluted by untreated ________ and industrial waste.
  6. 10. large areas that are difficult to identify and control, and expensive to clean up.
Down
  1. 1. chemicals used in agriculture, industry, ___________, and homes can spill and leak into groundwater and make it undrinkable.
  2. 2. change in water quality that can harm organisms or make water unfit for human uses.
  3. 4. The picture in the notes is of the ______ River.
  4. 7. the key to protecting the oceans is to reduce the flow of pollution from land, air, and _______ emptying into ocean waters.