Yes, ADHD is real. 1 in a 10,000 real. Not the 1 in 10 children which is claimed. You know what the massive majority of 'ADHD' is? Restless energetic kids that need an outlet for their energy and having to put up with their fat couch potato parents not keeping them stimulated. Go read 'Selling Sickness', it has all the documentation and references on ADHD (and other 'illnesses'), then get back to us.
Because if it was represented in green then it would look good and healthy. Showing it in purple, although it clearly shows a healthy state, can be perceived as unhealthy. "See? Its purple! The earth is sick because its purple!"