Answer:
I break down buildings, I crumble mountains but you can't see me. What am I?
You throw away my outside you cook my inside. Then you eat my outside and you throw away my inside.
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you. What am I?
I live off of a busy street if you want you can stay for an hour or two but if you don't pay rent I'll tell on you.
I have a foot but no leg. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.