Across
- 4. - Reprocessing of waste material for use in new products
- 6. - When new tree are planted in an area where no trees before
- 7. - The sciences of organisms and their environment
- 9. - No longer living
- 10. - kfk
Down
- 1. - The are of land where large amount of waste material are burried under the earth
- 2. - Mixture of various decaying organic substances
- 3. - A process that occurs when gases in eart
- 5. - Introduction of harmful materials into the environment
- 8. - Average weather in a given area over a large period of time