Increase awareness of asthma and its. public health consequences. Promote identification of reasons for the. increased prevalence of asthma. Promote study of the association between. asthma and the environment This is the home page of the web site of the National Asthma Council (NAC). The NAC is an Australian non-profit body which serves the community by creating awareness and providing information about asthma. information about asthma. We subscribe to the HONcode principles.Verify here This is the home page of the web site of the National Asthma Council (NAC). The NAC is an Australian non-profit body which serves the community by creating awareness and providing information about asthma. information about asthma. We subscribe to the HONcode principles.Verify here Find the latest news stories, overviews, research and more on Asthma from MedlinePlus, the National Library of Medicine's consumer health site. Medicine's consumer health site. Asthma, Bronchial Asthma, Immune System, Immunologic Diseases