Add appropriate question tags to the following sentences.
1. Cities are increasingly becoming urbanised.
2. They experiment with ways to improve air quality.
3. The aim should be to reduce congestion.
4. There is an urgent need to provide clean, reliable and affordable energy to their growing populations.
5. Automation and shared mobility will play a key role in this transformation.
6. It changes the way people commute in cities.
7. Before long, a fleet of electric autonomous vehicles (AVs) could drive people to their destinations.
8. These shared AVs will run at higher utilization rates.
9. They can substantially reduce the cost of mobility and congestion.
10. These should not be thought of as luxury but as necessity. .
