Across
- 1. what type of tree-cutting is like checkerboards?
- 3. production of growing crops
- 4. what spilled in the water in Gulf?
- 6. acidic precipitation
- 7. different kinds of life
- 8. tiny organism that helps the quality of soil
Down
- 1. Harmful chemicals to the environment
- 2. removal of trees
- 5. what type of field grows rice?