Across
- 2. toxic gases from factories that pollute the atmosphere
- 4. to process materials so that they can be used again
- 6. large areas where garbage is disposed
- 7. the illegal hunting of animals
- 8. a large body of salt water between continents
- 9. contamination from factories
Down
- 1. untamed animals (in their natural habitat)
- 2. when an animal or plant ceases to exist entirely
- 3. without chemicals or additives
- 5. a forest found in tropical climates with heavy rain