Sri Lanka, May 5 -- Judging from recent global statistics the world seems to be on the brink of an Asthma epidemic. Sri Lanka is no exception. Climatic changes, air pollution from vehicular emissions, overcrowded ill ventilated houses in urban areas, and tobacco smoking are some of the leading contributory factors that have driven this condition in the past decade or so in Sri Lanka especially. While Asthma is one of the most common non communicable diseases, many who even have the disease don't know how it is caused, what triggers it, and its serious impacts on the human body as whole, if treatment is not sought in time. The Sunday Observer spoke to the Senior Registrar National Chest hospital Welisara Dr. Nilanthi Gunathilaka to give us...