Environmental can mean how you were treated (product of your environment) but also the natural environment we live in. There is no delusion at all in the studies done linking various menatl and physical illnesses to environmental factors of this kind…
here is an example regarding GMO foods
'As early as 2008, NaturalNews.com reported about a condition called Morgellon’s disease. The article went on to report the symptoms of the disease as follows: crawling, stinging, biting and crawling sensations; threads or black speck-like materials on or beneath the skin; granules, lesions. Some patients report fatigue, short term memory loss, mental confusion, joint pain and changes in vision. Furthermore, there have been reports of substantial morbidity and social dysfunction leading to a dip in work productivity, job loss, total disability, divorce, loss of child custody and home abandonment.
Prior to its reporting, the condition was dismissed as a hoax, but upon further investigation, the evidence pointed out that the disease was real and may be related to genetically modified food.
Learn more: GMO alert: top 10 genetically modified foods to avoid eating - NaturalNews.com
As far as things like ghosts and spirits, we are not “ill” if we see or sense these. I know my wifes ghost has more than proved herself…she has physically manifested things out of thin air to two different people. Among other feats of power.
The Moon affecting us due to the abundance of positive ions in the atmosphere is a proven fact…since we know ions do affect our brain.
While some conspiracy theory is way out there, it is based on some things that are real… if you want proof of that - for many years we heard conspiracy theories that the govt was monitoring our phones and emails…Many thought it was just a conspiracy theory… until last year when Snowden blew the whistle on the NSA… not so conspiracy any more now.