Across
- 5. energy from heat inside Earth
- 7. energy from living or once living material
- 10. taking responsibility for caring for Earth
- 12. natural resource used to produce energy
- 13. energy from the sun
- 14. replaced as fast as it is used
- 15. air pollution that forms a brown haze
- 17. harmful substances in the environment
- 18. energy from moving air
- 19. protecting and wisely using resources
- 22. contamination of land by waste
- 23. harmful gases or particles in the air
- 26. movement of soil by wind water or ice
- 27. anything in nature people use
- 28. energy from moving water
- 30. rain rain mixed with pollution that damages the environment
- 31. splitting atoms to release energy
- 34. energy from sources that will not run out
- 35. damaging environments where organisms live
Down
- 1. cutting down large areas of trees
- 2. used faster than it can be replaced
- 3. contamination of water sources
- 4. gas in the atmosphere that protects Earth from UV rays
- 5. increase in Earths temperature
- 6. using fewer resources
- 8. reusing materials to reduce waste
- 9. fuel from ancient plants and animals
- 11. planting trees to replace those cut down
- 16. removing minerals or resources from Earth
- 20. energy from the nucleus of an atom
- 21. growth of cities and human development
- 24. gas gaseous fossil fuel used for heating and cooking
- 25. using resources so they last for future generations
- 29. using items again instead of throwing them away
- 32. solid fossil fuel used for electricity
- 33. liquid fossil fuel used for gasoline