Across
- 1. The introduction of harmful products to an environment
- 3. Relating to the sea
- 6. Any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened
- 8. An animal that is caught and killed by another for food
- 9. A long-term change in the earth's climate, especially a change due to an increase in the average atmospheric temperature
- 10. Something that can cause potential harm
- 13. A transparent, odorless, tasteless liquid, a compound of hydrogen and oxygen
- 15. To spread or swarm over in a troublesome manner
- 16. The animals of a given region or period considered as a whole
Down
- 2. Any part of or the entirety of salt water that covers more than 70 percent of the earth's surface
- 4. Of, in or pertaining to water
- 5. Of, relating to, bordering on, or located near a coast
- 7. The plants of a particular region or period, listed by species and considered as a whole
- 8. A destructive animal
- 11. The natural environment of an organism
- 12. The aggregate of surrounding things, conditions, or influences
- 14. An animal that naturally preys on others