Across
- 3. an agency that protects the environment.
- 4. mid-west in america, dust blown by wind.
- 8. its atomic number is 80.
- 9. used to kill plants.
- 10. its atomic number is 16.
- 11. to maintain something at a certain level
- 12. a layer of the atmosphere and a toxic molecule.
- 14. water found under ground.
- 15. A large part of ground erosion and deforestation
- 16. used to kill bugs.
- 18. factories and other mechanical production facilities.
Down
- 1. Its atomic number is 82
- 2. 1 carbon and 2 oxygen atoms.
- 5. A way of farming or a hill and preventing soil loss
- 6. the destruction and moving of soil.
- 7. used to promote plant growth.
- 10. caused by industrial air pollution and transportation.
- 11. humans on Earth.
- 13. particles carried from construction.
- 17. A period with little to no water