Fungal spores, bacterial and animal dander are examples of which type of pollutants?

Fungal spores, bacterial cells, and animal dander are categorized as biological pollutants because they originate from living organisms and can adversely affect human health and the environment. Biological pollutants include a wide range of microorganisms, such as bacteria and fungi, as well as particles from animals, like dander. These substances can trigger allergic reactions, respiratory ailments, and other health problems, particularly in sensitive individuals.

While some of these contaminants can also be classified as allergens, the term "biological pollutants" encompasses a broader category that includes not just allergens but any biological agents that can contaminate the environment. This distinction is significant because it highlights the source of these pollutants—living organisms—and their potential harmful effects on both human health and ecosystems.