Across
- 3. farming a type of agriculture that uses no harmful pollutants or chemicals
- 4. a chemical used to kill weeds
- 8. chemicals used to kill or get rid of pests that are harmful to the crop
- 10. makeup the genes that tell the traits of an organism
- 12. the gas that all humans and animals breathe
- 13. chemicals used to keep rodents like squirrels and mice away from crops
- 14. the process plants go through to create their own food
- 16. the amount produced
- 18. the cutting down of forests resulting in clear land
- 22. chemicals that keep insects from eating and destroying the crop
- 26. a very large unit of measure equal to about 2.471 acres
- 28. to make clean and pure
- 29. to take in
Down
- 1. to rely on
- 2. to make available
- 4. the natural home of a plant, animal, or organism
- 5. when a species no longer exists on the Earth
- 6. plants that grow where they are not wanted
- 7. a substance or object that intrudes in an area that has harmful effects
- 8. a pollution clean-up method where trees are used to absorb chemicals
- 9. substances that are harmful to the environment
- 11. a plant grown for food
- 15. gases gases that get trapped in the atmosphere and cause global warming
- 17. chemicals used to destroy fungus
- 19. chemicals or other substances that are used to make the soil more fertile
- 20. the "bubble" of gases that surround our planet
- 21. modification changing the genetic makeup of a crop so that it is immune to the affects of pesticides and other chemicals
- 23. farming a type of agriculture that is done on a large scale uses herbicides, pesticides, and other chemicals
- 24. not effected by something
- 25. warming the gradual increase in temperature of the Earth's atmosphere
- 27. dioxide the most common greenhouse gas found in our atmosphere