Well, YOU should, because they're not only eating away at your house, they could be eating away at your health, too. Here we'll take a look at what mold and mildew are, how they affect the health of you and your house and, finally, how you can prevent their growth and get rid of the stuff. The first is that their mission on Earth is to digest the organic world around them. The second is that they all need moisture so their little digestive enzymes can go to work. There are differences between mold and mildew, but for our purposes, we can call the entire gang mold.
Molds are neither plants nor animals.
But the truth is, these decay organisms aren't unsavory at all. Without them, toppled trees, dead animals and fallen vegetables wouldn't decompose. Our land would get piled higher and higher with dead stuff. We wouldn't have foods and medicines like cheese and penicillin. Mold needs to consume something to survive, and it's perfectly happy eating your house if you let it.