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PEHSU Factsheet: Mold in the Home & Schools > What is mold?

What is mold?

posted on Aug 26, 2021

Molds are fungi, such as mildew, mushrooms and yeast that can be found both indoors and outdoors. No one knows for sure how many species of fungi exist but estimates range from tens of thousands to perhaps three hundred thousand or more. They have been known for centuries.