In recent years the number of consumer products containing fragrances has skyrocketed. Thousands of fragrances have invaded our air space and become a part of our daily routine. But some people with respiratory problems might say that their homes and work places have turned into virtual gas chambers.

Fragrances are not limited to perfumes and colognes. Where else can they be found?

• Hair spray, bar soap, body and facial lotion, shampoo, cosmetics, deodorant and aftershave often contain...