Super Crossword

Crossword: Spencer, Music: Eddy, PJMS
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4    5    6              
                
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Across

1. Largest reef system in the world
4. Where is the Hoover Dam located
7. Where does most water for household purposes go
8. What material takes the longest to degrade once disposed of
9. Who owns the Arctic Circle

Down

1. The Earth's increase in temperature and its projected escalation
2. What is the term used for whale fishing
3. Sharks and whales are hunted with what spear like object
5. The state change from solid water to water vapor
6. What percentof the world's shark population has been wiped out