Across
- 3. harmful substances released into the environment
- 7. – heat energy from inside the earth
- 9. panel – a device that converts sunlight into electricity
- 11. leftover waste that can be used again
- 12. – a natural resource used faster than it can be replaced
- 16. turbine – a machine that turns wind into power
- 17. – the practice of using fewer materials
- 19. gas – gas that traps heat in the atmosphere
- 21. management – the careful management of natural resources
- 23. efficiency – cutting down on the amount of energy used
Down
- 1. – a habitat with a wide variety of living things
- 2. warming – the warming of earth’s atmosphere
- 4. – using resources without wasting them
- 5. trees planted to replace those cut down
- 6. – protecting the environment for the future
- 8. – power produced by moving air
- 10. – the layer of gases surrounding earth
- 13. energy – energy that comes from natural, unlimited sources
- 14. – energy made from flowing water
- 15. fuel made from plants or organic matter
- 18. energy from the sun
- 20. the process of turning waste into new products
- 22. – material that can break down naturally