Seriously?! What a maroon.
Actually it has sound science behind it.
It began with the lean movement in healthcare.
They were looking at post-op surgeries and found a distinct divide in a group for healing, pain meds, whiny nurse activity, etc.
I will find and post that for you later today.
Trees really are good for you.
Ok here ya go..
http://www.theatlantic.com/health/archive/2013/03/how-nature-resets-our-minds-and-bodies/274455/