Across
- 5. the thin layer of life on the earth
- 6. everything that surrounds us including living things and man made products.
- 7. the study how humans effect the environment
- 10. a resource that can be replaced as it is used
- 11. any natural substance that can be used by living things
Down
- 1. when the population grows faster than the environment can support
- 2. the introduction of waste material or harmful chemicals into the environment
- 3. a world where people can live and have all the resources they need for generations to come
- 4. an increase in the earth's temperature as a result of trapped carbon dioxide
- 8. a resource that cannot be replaced
- 9. when people use resources faster than they can be replaced