Hi, Amyotrophic Lateral Sclerosis (ALS) is the most common form of motor neuron disease, yet, to date, the exact etiology of ALS remains unknown. Environment, smoking and occupational disease may aggravate the problem. There s is no studies that have shown amyotrophic lateral sclerosis has related to molds exposure. Hope I have answered your query. Let me know if I can assist you further.