"The main issues with air pollution is ozone gas levels and particulates. Ozone gas levels are produced by the interaction of sunlight with chemicals that are released from automobile exhausts, particularly diesel vehicles, factories, chemical power plants and smoke generated from coal and oil burning," the ISJ web site quoted Dr. Arun Nair, Chief of Interventional Pulmonary Medicine at Amrita Institute of Medical Sciences and Research Center (AIMS) at Kochi, as saying. Dr. Nair said "Asthma is not curable, but with advances in therapy, it can be effectively treated in a majority of cases with minimal side effects."