Across
- 3. Pollution contaminates water, harms life
- 5. The gas used by bacteria to decompose organic matter
- 6. Occurs when too many nutrients enter an aquatic ecosystem
- 8. Pollution from various, scattered sources
- 10. When land that used to be healthy turns dry and empty
- 12. The organisms responsible for decomposition in aquatic ecosystems
- 13. Used by people with no access to sewer system
- 14. Pollution that falls as rain
- 16. Pollution from a single, identifiable source
- 18. The removal of large areas of forest for human purposes
Down
- 1. The number one cause of habitat destruction
- 2. An aquatic plant that grows exponentially due to eutrophication
- 4. Gas that increases due to deforestation
- 7. Animals lose this due to deforestation and urbanization
- 9. When land is used for the development of cities
- 10. A structure that blocks water from flowing in rivers
- 11. An example of deforestation
- 15. Extra water that often transports pollutants
- 17. Uses manure and other natural sources for nutrients
- 18. Zone No life can exist; happens when all oxygen is used up