Indoor Air Quality - Sources of air pollutants. Indoor air pollutants can be categorised into two main groups: biological and chemical. Symptoms of health problems caused by biological pollutants include: sneezing; itchy watery eyes, coughing, shortness of breath, dizziness, redness, fever and digestive problems. Chemical pollutants, depending on the type of the pollutant, have the potential to cause respiratory infections and damage and irritation to the lungs.