According to the text, what is currently NOT listed as a confirmed environmental trigger for common ailments in many mainstream medical texts?

Answer

Geomagnetic storms

Due to the difficulty in proving causation and the small magnitude of surface fluctuations, many mainstream medical texts do not list geomagnetic storms as a confirmed environmental trigger for common ailments.

According to the text, what is currently NOT listed as a confirmed environmental trigger for common ailments in many mainstream medical texts?
effectsspace weathergeomagnetic stormsEarth's magnetic fieldhuman behavior