Recently, a doctor friend of mine in Hyderabad commented that too many people were approaching him with respiratory disorders. This can be partly explained by the winter cold. But in a substantial measure our illnesses are man-made. Here are some facts for you. A study by a reputed public health journal pointed out that 30-50 % of twin cities population is suffering from allergy, asthma and other respiratory disorders. Other studies also pointed out that almost 25% of school children in the city are suffering from asthma and other respiratory disorders such as bronchitis.