You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

What does a man do only once in his lifetime, but women do once a year after they are 29?

What runs around the whole yard without moving?

What can jump higher than a building?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

I am white when I am dirty, and black when I am clean. What am I?

What has many teeth, but cannot bite?

What kind of storm is always in a rush?

There is something which is always coming but never arrives?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.