#WATCH | Delhi: Dr Atul Mathur, Interventional Cardiologist and Executive Director Fortis Escorts Heart Institute, says, "This pollution problem in our country and especially in North India, has been there for many decades... There are two types of components in pollution. One is gases like nitrogen oxide gas, which is harmful, and the second is particulate matter... When these particles circulate in the body, they inflame the arteries of the body... This is the season where there are a lot of viruses... It is very important that you reduce your outdoor exposure. If it is very important, then try to wear light masks..."