Bio-based Product - A product (other than food or feed) that is produced from renewable agricultural (plant, animal and marine) or forestry materials.

Biodegradable - something when left alone break down and be absorbed into the eco-system.

Biological Contaminants - Agents derived from living organisms (e.g., viruses, bacteria, fungi, and mammal and bird antigens) that can be inhaled and can exacerbate many types of health effects including allergic reactions, respiratory disorders, hypersensitivity diseases and infectious diseases. Also referred to as “microbiologicals” or “microbials.”

Biomass - Wood - based materials, agricultural crops, landfill gas, animal and other organic waste. When used as an energy source, biomass is considered to be a source of renewable energy.

Bio-Fuel – Also known as BioFuel, is a fuel produced from dry organic matter or combustible oils produced by plants. Examples of Bio-Fuel include alcohol (from fermented sugar), black liquor from the paper manufacturing process, wood, and soybean oil.

Biomimicry - The study of nature and imitation of nature's forms. The process of learning from and then emulating life's genius.

Blackwater – the wastewater generated by toilets.

Building Related Illness (BRI) - Diagnosable illness with symptoms that can be identified and with a cause that can be directly attributed to airborne building pollutants (e.g. Legionnaire's Disease, hypersensitivity pneumonitis).