What are common environmental allergies in the home?

Pets dust mites mold. Indoor environmental allergens include pet dander, dust mites, cockroaches and molds. Most people are more allergic to cats than dogs. Dust mites live in mattresses, pillows, bedding, and carpet. The more humid the environment, the more dust mites.
See below. Dust mites, pets, cockroach, and molds.