Across
- 2. an international holiday to honor the need to protect the environment
- 4. use of resources in such a manner that they will never be exhausted
- 5. increase in the average temperature of the Earth's air and oceans
- 6. fossil fuel formed from the remains of marine plants and animals
- 7. energy obtained from sources that are virtually inexhaustible and replenish naturally over small time scales
- 9. conditions that surround and influence an organism or community
- 10. law, legal act, or statute
- 11. management of a natural resource to prevent exploitation, destruction, or neglect
Down
- 1. gas in the atmosphere that absorbs heat reflected by the surface of the Earth
- 3. a material that humans take from the natural environment to survive, to satisfy their needs, or to trade with others
- 8. natural or manufactured substance used to kill organisms that threaten agriculture or are undesirable