Earth Day

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