Across
- 3. gov’t mandated fuel efficiency
- 6. species presence/absence indicates health
- 7. water get more nutrients, algae growth
- 9. fuel that is made from plant material
- 10. groundwater underground of permeable rock
- 12. burn a managed fire set intentionally
- 15. organism whose genetic material has been altered
- 17. thrive in wide variety of environments
- 19. careful use of natural resources by humans.
Down
- 1. wet one side dry another
- 2. disease restricted to a particular locale
- 4. outer shell of the earth
- 5. organic component of soil
- 8. the production of food by growing plants
- 11. conversion of wasteland into land suitable
- 13. the incidental catch of unwanted fish/species
- 14. a loss when drought degrade topsoil
- 15. Revolution shift in agriculture practices
- 16. time 70 ÷ growth rate
- 18. weak trade winds in Pacific, warmer waters