Where’d you get psychosomatic from? You try to smell natural gas for three months and see how long you last before you start feeling sick to your stomach or get a headache.
I remember many years ago I opened my (attached) garage door and was hit with the smell of a gas leak. I walked inside and the whole house reeked of gas. I noticed the stove was turned on (with no flame) and turned if off right away and started opening up windows and doors. I asked my (now ex) wife what was going on. The first thing she said is “I wonder if that’s why I have a headache”.
Inhalation exposures: Symptoms may include fever, cough, dyspnea, tightness
and burning in the chest, dizziness, headache, loss of sense of smell, nausea, vomiting and diarrhea.
Non toxic or not (and the victims being rich or otherwise), they still shouldn’t have to smell it…for months on end.
I assume you wouldn’t mind if it was happening in your backyard, right?