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Across 2. coal and oil are examples of this type of fuel 5. CH , greenhouse gas 6. a resource that can be replaced 8. contamination 9. discharges 11. nature provides us with ecological _______________ 13. ____________protocol 14. layer of gases surrounding the Earth 17. to do with the whole planet 23. the ability of an ecosystem to function effectively 24. heat from inside the Earth's crust 25. temporary atmospheric conditions

Down 1. atmospheric conditions over a long period of time 2. mark we make on the earth, also a measurement 3. to do with the sun 4. lessen 7. variety of plant and animal life 10. something that can continue into the future 12. sufficient 15. too much pressure on something 16. effective 18. Rising temperatures causes this to happen to coral reefs 19. increased 20. traps heat 21. to do with water 22. heating