Across
- 2. erosion
- 4. nonliving
- 5. of pollution
- 9. too many nutrients in water which cause too much algae to grow
Down
- 1. too many microorganisms in water which can make you sick
- 3. a single,identifiable
- 6. soil into rivers and lakes
- 7. cloudy water, which blocks sunlight
- 8. that comes from many places at once