Across
- 1. harnessing the Sun's energy to generate electrical power
- 5. the lower part of the atmosphere which contains a high level of ozone that absorbs the majority of the sun's ultraviolet rays
- 7. the continuous absence of rain, thus causing the land to dry up
- 9. acidic precipitation (rainfall) that causes harm to the environment. It is formed in the atmosphere when industrial waste gases combine with water
- 12. an increase in the temperature of the Earth's atmosphere, which is due to the greenhouse effect
- 14. any activity that compensates for the emission of carbon dioxide (CO2) or other greenhouse gases
- 16. fuel formed naturally over many years from the remains of animals, such as coal, oil, and natural gas
- 17. use only as much energy as is needed without wasting any
- 18. to convert or reprocess materials so that they can be used again
- 19. the illegal hunting of animals
- 20. the introduction of harmful materials into the environment
Down
- 2. without chemicals (such as sprays) or other man-made additives
- 3. to care for, preserve and protect
- 4. arge areas of land where waste and garbage are disposed
- 6. maintaining an ecological balance by avoiding the depletion of natural resources
- 8. the distance between the place where food is grown or made and the place where it is eaten
- 10. total amount of greenhouse gases (including carbon dioxide and methane) that are generated by our actions
- 11. materials that could be useful (i.e. for energy, for building, etc.) but have not yet been explored
- 13. generally referring to packaging, it means something than can be decomposed by bacteria or other organisms
- 15. toxic gases from factories and machinery that are then leaked into the atmosphere
- 17. when a plant or animal species ceases to exist entirely