Across
- 3. removes toxins from sewage before it goes into oceans, rivers, lakes
- 5. catching aquatic animals
- 7. Biotic factors are
- 9. planting and care for forests
- 10. I live on this (terra firma)
- 11. removes useful items from the earth
- 12. aquatic things live in
- 14. raising large amounts of animals on a large piece of land
Down
- 1. makes an area more urban
- 2. aqueous liquid used to help animals and us survive
- 4. farming plants/food and raising animals to survive
- 6. introduces harmful things to the environment
- 8. removes dissolved mineral salt from water
- 13. contained in the atmosphere