Answer:
I help engines spin and pants stay up
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I let water fall on you while everyone else stays dry. What am I?
Poor people have it. Rich people need it. If you eat it you die. What is it?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?