Across
- 2. avoiding vehicles to lower carbon dioxide level
- 3. illegal hunting of animals
- 5. fog caused by atmospheric pollutants
- 6. fuels gas coal petrol
- 7. the place where animals are kept for protection
- 8. a place full of litter
- 9. easily dissolved in the nature without doing harm
Down
- 1. huge amount of toxic substances in the nature
- 4. act of protecting nature
- 5. functioning without harming the environment