For nearly as long as humans have known about black mold, they have worried about its potential effects. During the early 1900s, people began to claim that black mold was extremely toxic and could cause many health issues. Anecdotal reports and studies indicated black mold could lead to everything from congestion to cancer. However, in recent years, experts have raised some doubts surrounding black mold and its presumed effects.
One of the main sources of confusion concerning black mold is that people believe it is a single type of mold. In reality, there are many black molds, with the two most common being Stachybotrys chartarum and Aspergillus niger. Both types grow in unique environments, with the former found in cellulose-rich building materials, though it can sometimes appear in soil or grain. A. niger grows primarily on fruits, vegetables, and soil. Because it can sometimes appear in indoor environments, people often confuse it for other types of black mold.
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