Answer:
In many hallways you would stand, if not with this in hand.
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.
Split me in half, and you get me and another me. What word am I?
What get's more wet while it dries?
Environmentalists want to keep this from drying.
People take me on walks and I run and have fun. What am I?