Certain fungi are a type of organism that can cause a variety of problems in humans and other living things. Two examples of certain fungi are mold and SMUT. Mold is a type of fungus that grows on damp surfaces and can cause respiratory problems in humans. SMUT is a type of fungus that affects plants, causing them to become discolored and stunted. Both mold and SMUT can be difficult to eradicate and can cause significant damage to crops and buildings.