First, just to be clear, issue at hand is the title, which states trees CAUSE calmness which CAUSES health. All the research shows is there's a link between tr

First, just to be clear, issue at hand is the title, which states trees CAUSE calmness which CAUSES health. All the research shows is there's a link between trees and health; aka there's a correlation, not causation. Best example I'm aware of of "confounding factor" is that there's an obvious correlation between an increase in people drowning in pools and ice cream consumption rates. Eating ice cream does not cause drowning, nor do drownings cause people to eat ice cream. Hot weather causes people to swim more, which increases the odds someone will drown. All I'm saying is this research does not show causation or look for confounding factors, which might show the correlation itself is a false positive.