In other blogs on this site, I talk about how the natural world connects with and replenishes us, performs a balancing of our energy, such as through the negative ions emissions of moving water – waterfalls, streams, and ocean waves – and also deep forests such as old growth forests. We become stressed and toxic by the fact that downtown areas have very little natural life surrounding it, have a deficiency of negative ions, and carry an excess of positive ions.
This article about nature emitting neurotransmitters takes it to a new level. It seems the premise of the blockbuster movie Avatar (by James Cameron) and its premise is pretty close to how things really are in the natural world. This is a good read: