Water in the world

Water and trees, Bees need trees, My dog ain't got no fleas.
We need H20, otherwise you go slow, 
Chewbacca comes from a planet that has a lot of cold aqua.
Outside it is very damp, I like riding up a ramp.
It looks like there is going to be a flood,
My dog loves rolling around in the mud.
You know water can evaporate, water and trees collaborate.
Trees can grow, only very slow.
Water can drain away my pain.