Across
- 2. the combination of smoke and fog caused by pollution
- 4. smoke or gas that has a sharp smell when inhaled or is harmful when inhaled
- 5. the light coming from the moon
- 6. the rise and fall of the ocean level
- 8. the time just before the sun sets
- 10. without any light
- 11. very sharp incline
Down
- 1. the green and red lights that appear in the sky in the northern hemisphere
- 2. having a number below zero degrees
- 3. the existence of a range of plants and animals in a natural enviroment
- 7. a sudden fall of rock or dirt down a mountain or steep hill
- 9. the time just before the sun rises