Mold is a type of fungus that thrives in moist environments. It can grow on almost any surface, including wood, paper, carpet, and food. When mold spores land on a wet or damp surface, they begin to grow.
Mold needs four things to grow:
1. Moisture
2. A food source
3. Warmth
4. Oxygen
Mold spores are found both indoors and outdoors. They can enter your home through open doors, windows, vents, and heating and air conditioning systems. They can also be carried in on clothing, pets, and shoes.
Once mold spores are in your home, they can grow on damp or wet surfaces. Mold can also grow in dry areas if there’s enough dust or other organic material for the mold to feed on.
Mold can cause a variety of health problems, including respiratory infections, asthma, and allergies. People with mold allergies are especially susceptible to these health problems.
Indoor air quality can be improved by controlling the source of moisture, cleaning up mold growth, and ventilating the home.
Source: https://www.epa.gov/mold/molds-and-your-health
Source: https://www.cdc.gov/mold/dampness_facts.htm
Source: https://www.mayoclinic.org/diseases-conditions/asthma/expert-answers/mold-and-asthma/faq-20057973