Across
- 5. A fast train that travels under the ground (Metro).
- 7. To make something die.
- 9. Dirty air or water that is bad for the planet.
- 10. Too many cars on the road that cannot move.
Down
- 1. To move from one place to another in the city.
- 2. A line of people waiting for their turn.
- 3. A very, very long time.
- 4. Another word for "fast." The opposite of slow.
- 6. The busy time when everyone goes to work or school.
- 8. Something that costs very little money.