Answer:
I am easy to waste and unstoppable
I row quickly with four oars, but never come out from under my own roof. What am I?
What has a bottom at the top?
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls