Across
- 3. COAL, OIL, AND NATURAL GAS FORMED FROM REMAINS OF PLANTS AND ANIMALS THAT LIVED MILLIONS OF YEARS AGO
- 5. A SYSTEM THAT CAN MAINTAIN ITSELF OVER TIME WITHOUT DEPLETING RESOURCES
- 7. GASES RELEASED INTO THE AIR, ESPECIALLY THOSE THAT HARM THE ENVIRONMENT
- 10. THE WARMING OF EARHT'S SURFACE DUE TO THE TRAPPING OF HEAT BY GREENHOUSE GASES
- 12. AN ECONOMIC SYSTEM THAT RELIES ON EXTRACTING NATURAL RESOURCES
- 13. THE TOTAL AMOUNT OF GREENHOUSE GASES RELEASED INTO THE ATMOSPHERE BECAUSE OF YOUR ACTIONS
- 14. PROTECTING AND TAKING CARE OF THE NATURAL WORLD
- 17. THE ENVELOPE OF GASES SURROUNDING THE EARTH
- 18. CLEARING OF FORESTS FOR HUMAN USE
- 20. A STRAIGHTFORWARD WAY OF THINKING WHERE ONE CAUSE LEADS TO ONE EFFECT
- 21. THE FUNDAMENTAL REASON FOR THE OCCURRENCE OF A PROBLEM
Down
- 1. THE EFFECTS OF CLIMATE CHANGE ON WEATHER PATTERNS AND THE ENVIRONMENT
- 2. A COLORLESS ODORLESS GAS PRODUCED BY BURNING FOSSIL FUELS
- 4. SOLUTIONS THAT ADDRESS THE ROOT CAUSE OF PROBLEMS BY CONSIDERING THE ENTIRE SYSTEM
- 6. AN ECONOMIC SYSTEM THAT RESTORES AND RENEWS RESOURCES AND ECOSYSTEMS
- 8. ENERGY FROM NATURALLY REPLENISHED RESOURCES
- 9. GASES IN THE EARTH'S ATMOSPHERE THAT TRAP HEAT
- 11. THE ACTION OR PROCESS OF CONVERTING WASTE INTO REUSABLE MATERIAL
- 15. AN APPROACH TO PROBLEM-SOLVING THAT LOOKS AT THE WHOLE SYSTEM AND THE INTERACTIONS BETWEEN ITS PARTS
- 16. WHEN A NATURAL HABITAT IS NO LONGER ABLE TO SUPPORT ITS NATIVE SPECIES
- 19. LONG TERM CHANGES IN THE AVERAGE WEATHER PATTERNS
