Mold?
A growth of minute fungi forming on vegetable or animal matter, commonly as a downy or furry coating, and associated with decay or dampness. 2. any of the fungi that produce such growth. verb (used with object), verb (used without object) 3. to become or cause to become overgrown or covered with mold. (Source: Wikipedia).
Asbestos?
The term asbestos designates a group of naturally occurring fibrous minerals with current or historical commercial usefulness due to their extraordinary tensile strength, poor heat conduction, and relative resistance to chemical attack. For these reasons, asbestos is used for insulation in buildings and as an ingredient in a number of products, such as roofing shingles, water supply lines, fire blankets, plastic fillers, and medical packing, as well as clutches and brake linings, gaskets, and pads for automobiles. The principal forms of asbestos are chrysotile (white asbestos) and crocidolite (blue asbestos). Other forms are amosite, anthophyllite, tremolite, and actinolite.