Crossword

Across

1. 1. official rules made by authorities to control an activity (10)
2. 5. too much traffic that slows movement on the roads (10)
3. 11. a person chosen to represent a country or group at a meeting (8)
4. 12. Gases released into the air, often from burning fuel (9)
5. 13. done by choice, not required by law (9)

Down

1. 2. the state when a type of animal or plant disappears forever (10)
2. 3. To fill a battery with electricity again after use (8)
3. 4. able to operate by itself without a human driver (10)
4. 6. To make information known to the public. (8)
5. 7. To dig something out of the ground carefully. (8)
6. 8. An underwater wing that lifts a boat as it speeds up (9)
7. 9. A company or agency that runs a transport service (8)
8. 10. an agreed plan that organises goals and actions (9)