How Daily Habits and Environment Can Shape Your Lung Cancer Risk

The way people live and the environments they move through each day can shape their lung health over decades. While smoking is one of the most significant preventable risk factors for lung cancer, experts stress that other sources of exposure — second-hand smoke, household smoke from solid fuels, outdoor air pollution and certain occupational hazards — should not be overlooked.

Everyday exposures — from tobacco smoke and indoor cooking fumes to outdoor air pollution and workplace dust — can affect lung health over a lifetime, experts say, with World Lung Day observed on September 25, 2026 under the theme "A Lifetime of Lung Health."

For many people in India, these exposures are woven into daily routines. Hours spent in traffic, work in dusty conditions or cooking in a poorly ventilated kitchen may each seem unremarkable on their own, but repeated contact with harmful particles and pollutants can affect the respiratory system over time. The 2026 World Lung Day theme, 'A Lifetime of Lung Health', reflects a focus on protecting the lungs at every stage of life, with prevention, clean air and healthy habits at its centre.

Prof. (Dr.) Amitabha Chakrabarti, Senior Consultant, Thoracic and Vascular Surgery, Narayana RN Tagore Hospital, Mukundapur, Kolkata, said that safeguarding the lungs requires attention to both personal behaviour and the surrounding environment.

Tobacco exposure remains a leading risk

Smoking cigarettes and beedis is strongly linked to lung cancer. Tobacco smoke carries a range of harmful substances that can damage lung tissue and trigger cellular changes over time. The American Lung Association identifies cigarette smoking as the primary cause of lung cancer. The risk is not confined to heavy smokers — sustained exposure over many years is significant, and non-smokers can also be affected through second-hand smoke. Vaping and e-cigarettes should not be considered entirely safe either, as their aerosols can carry nicotine, other chemicals and particles. Avoiding tobacco smoke and vaping aerosols, especially in enclosed spaces, is considered an important protective measure.

Indoor smoke and household air quality

Indoor air quality is another factor that can be overlooked. In homes where wood, coal or other solid fuels are burned for cooking or heating, smoke can build up — particularly where ventilation is poor. People spending several hours a day in such environments face prolonged exposure to particulate matter and other pollutants. Women who regularly cook in such households may experience considerable exposure as a result. Improving ventilation and cutting down on household smoke can help produce a cleaner indoor atmosphere, a point also emphasised in the broader World Lung Day campaign.

Outdoor pollution, diet and persistent symptoms

For those living in or passing through heavily polluted urban areas, outdoor air pollution presents an additional concern. Fine particulate matter can penetrate deep into the respiratory system, and traffic-related pollution compounds overall exposure. The American Lung Association recommends avoiding outdoor exercise near heavy traffic and taking steps to limit exposure when air quality is poor. FIRS has also repeatedly placed clean air at the centre of its World Lung Day messaging, recognising air pollution as a significant threat to lung health internationally.

Lifestyle factors such as diet and physical activity also contribute to overall lung health. A balanced diet rich in fruits, vegetables and other nutrient-dense foods supports general wellbeing, while regular exercise helps maintain fitness and respiratory capacity. These factors, however, are not direct substitutes for avoiding established lung cancer risks. Quitting tobacco, steering clear of second-hand smoke and reducing exposure to harmful pollutants remain the most important preventive steps, with the World Lung Day campaign encouraging healthy eating and physical activity alongside being smoke-free and breathing clean air.

Paying attention to persistent symptoms is also part of protecting lung health. A cough that does not resolve, ongoing breathlessness, wheezing or a noticeable change in breathing should be discussed with a healthcare professional. The American Lung Association notes that persistent cough and unexplained shortness of breath warrant medical evaluation. Not every such symptom signals cancer, but symptoms that persist or worsen should not be dismissed. The overarching message of this World Lung Day is that lung health requires consistent protection throughout life — through reduced harmful exposures, healthier daily choices and timely medical attention when symptoms arise.