Environmental Science

3. primary federal law in the United States governing water pollution
4. someone who studies marine life
6. the introduction of harmful materials into the environment
10. a measure of the demands made by one person or group on global natural resources
12. biome with all the water on Earth
15. when a shared resource is unregulated, individuals will consume it at a selfish rate
18. biome with rocks and minerals on Earth
19. biome occupied by living organisms
20. biome with all the ice on Earth

1. the ability to be maintained at a certain rate or level
2. the study of living and nonliving things
5. a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra
7. a biological community of interacting organisms and their physical environment
8. a change in global or regional climate patterns
9. fossil fuels (source)
11. think about the cost of the resource and whether it is worth what is gained
13. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
14. they study how water moves across and through the Earth's crust
16. sunlight, fresh water (source)
17. an expert in or student of the behavior, physiology, classification, and distribution of animals