The key answer of exercise 2

Cars are good because:

1. They are convenient and take you from door to door.
2. You can use them to get to places where there is no public transport.
3. They are private and comfortable.

Cars aren’t good because:

1. They are expensive to run (petrol, tax, insurance, etc.).
2. They cause more pollution if they are used to transport one person.
3. Driving long distances is tiring and stressful. / There is a lot of traffic and congestion on the roads.