My opinion is SUBSTANTIATED by facts Carla, like the fact that Alzheimer's plaques are made up of an amyloid substance and the sponge is capable of producing amyloid substances and depositing them in great quantities.
Quarterly journal of microscopical ... - Google Books
This is only one link between the sponge and Alzheimer's, there are more but I am not prepared to list them all at this very moment since I don't have all of this data at my fingertips.
Since there are NO FACTS that link Alzheimer's to chemtrails this opinion is UNSUBSTANTIATED, that is the difference between the two opinions Carla.