1. Which of the following is not a natural cause of water pollution?

2. What type of water pollution can occur when sulfur dioxide gets into the Earth's atmosphere?

3. Where did the Exxon Valdez oil spill take place?

4. What can happen to fish when there isn't enough oxygen in the water?

5. True or False: Many people on Earth do not have access to clean water.

6. What type of water pollution is produced by farm animals?

7. What type of water pollution is produced from chemicals used to kill bugs and weeds?

8. How can you help prevent water pollution?

9. Around how much of the Earth's water is fresh water?

10. True or False: Although water pollution is bad, it doesn't actually cause anyone to die.