If you want healthy lungs don't take up running or vigorous exercise. Perhaps it is better to head for the country and stay away from smokers. Your body needs clean air in order to stay healthy. Living in cities is a no, no. If you live in London you will already have lung damage. Spending just 48 minutes there is equivalent to smoking a cigarette. It is not only cigarette smoke that is troublesome. Fumes from cars and diesel buses is something you can't avoid. Heading indoors is a waste of time. Pollution condenses down into corridors, tunnels and homes. Toxins are more than double that of the external environment. Plants help to clear the air. Don't use artificial air fresheners. Even the television pumps out volatile organic compounds (VOC). Unfortunately there is not a lot we can do in the modern world to avoid toxins. It's everywhere. Doing exercise will make the body take in more pollutants. Taking a holiday in the country is no answer - ozone from cities ends up ...