Answer:
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
What goes with a car, comes with a car, is no use to a car but a car cannot move without it?
A beacon from home to guide your way. It can be a lifesaver on a stormy day. What is it?
What has roots as nobody sees, is taller than trees. Up, up it goes, and yet never grows?
The more of me you take, the more I appear behind you. What am I?