Answer:
What can you put in a barrel to make it lighter?
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
It can cause deflation of tires when dropped from the rear of spy cars.
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
What begins and has no end? What is the ending of all that begins?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?