1. Chemicals or other harmful items that end up in the air, on land or in the water and that make the environment unhealthy.

2. Trash can become pollution Flagler Beach, October 9, 2004 Photo credit: Jerry Full Lesson 10: Pollution

3. Cars and other vehicles can cause air pollution Photo credit: EnvironmentBlog (Flickr) Lesson 10: Pollution

4. Smog is a type of air pollution Photo credit: Steven Buss (Flickr) Lesson 10: Pollution

5. Oil spills cause pollution Russian Doors/Marine Photobank 1 LN HTD KYSTVERKET/Marine Photobank Lesson 10: Pollution

6. Light can be considered pollution Photo credit: NASA Lesson 10: Pollution

7. Sound (loud noise) can be pollution Lesson 10: Pollution

8. Sewage can cause pollution Photo credit: Steve Spring/Marine Photobank Lesson 10: Pollution

9. Pollution can be invisible—we cannot see fertilizer and pesticides Photo credit: Chesapeake Bay Program (Flickr) Lesson 10: Pollution

10. Hot water can be pollution Photo credit: FPL/Nuclear Regulatory Commission Lesson 10: Pollution

11. How does pollution get into the water? Heavy rain washes things from the land into places like lakes, rivers and oceans. We call this stormwater. Photo credit: Chesapeake Bay Program Lesson 10: Pollution

12. Polluted or Healthy? Sometimes it is easy to tell…sometimes it is not Photo credits: Maia McGuire Lesson 10: Pollution

13. How can we keep our water and air healthy? Recycle Throw trash away properly Ride a bicycle or walk instead of driving a car Use solar or wind energy instead of energy from power plants Lesson 10: Pollution