Serious. Indoor air pollution is our biggest environmental problem as we spend 90% or more of our times inside. And for infants and babies indoor pollution are much higher though especially if they have allergies and they are not mobile. Pollutions such dusts, molds, bacteria, viruses, air sprays, aerosol, even e. Coli and now the deadliest bugs, MRSA and c. Deficilis. Log on: www. Drernie. Co.Cc for more.