Air pollution is a major risk factor for various lung-related illnesses. Since the lungs are constantly exposed to the air we breathe, the quality of that air is critical to overall lung health. The impact of poor air quality affects all age groups, but it is especially severe for women, children, and the elderly. Those from lower socioeconomic backgrounds are disproportionately affected, as they are more likely to be exposed to both indoor and outdoor air pollution.
Indoor air pollution
Indoor air pollution is particularly harmful in rural and low-income households. Many families still rely on traditional cooking methods like chulhas, using biomass fuels such as wood, animal dung, or crop waste. This increases the concentration of harmful pollutants in the home, putting women and children at particular risk. The World Health Organization (WHO) estimates that nearly one-third of the global population still cooks with open fires, which contributed to 3.2 million deaths in 2020. Exposure to these pollutants is linked to chronic obstructive pulmonary disease (COPD), worsening asthma, and even lung cancer.
Other common indoor pollutants include household dust, pet dander, mold, and pest allergens. These irritants can exacerbate conditions like asthma and increase the risk of respiratory infections. Tobacco smoke, another major source of indoor pollution, impacts both smokers and non-smokers through second-hand and third-hand exposure. Even when smoking stops, harmful particles linger on surfaces, posing a continuous risk.
Outdoor air pollution
Outdoor air pollution stems from vehicular emissions, industrial activities, and the burning of fossil fuels. Common outdoor pollutants include particulate matter, carbon monoxide, nitrogen dioxide, and sulfur dioxide. These pollutants can severely impact lung health.
Studies conducted on auto-rickshaw drivers and other individuals frequently exposed to outdoor pollution have shown higher incidences of respiratory issues such as chronic cough, breathlessness, and asthma. The prolonged inhalation of these pollutants increases the risk of developing chronic bronchitis and lung cancer. WHO estimates that air pollution accounts for 29% of lung cancer deaths and 43% of COPD deaths.
Children are especially vulnerable to the harmful effects of pollution. Studies show that children living in highly polluted areas are more prone to recurrent respiratory infections and even premature death due to respiratory complications.
Mitigating air pollution’s impact
To reduce the harmful effects of air pollution on lung health, several strategies can be employed. One important step is switching to cleaner cooking methods, such as using LPG instead of biomass fuels, which has been shown to significantly lower indoor pollution. Improved ventilation and reducing products that emit volatile organic compounds (VOCs) can also improve indoor air quality.
Minimizing exposure to outdoor air pollution is equally important. Reducing outdoor activities during peak pollution hours, using air purifiers indoors, and wearing respiratory masks in polluted areas can help protect lung health. Additionally, governments and industries need to take proactive measures to limit emissions and promote cleaner technologies.
Maintaining a healthy lifestyle is essential to combating the effects of pollution. Regular exercise, a balanced diet rich in antioxidants, and avoiding smoking can help protect and strengthen the respiratory system.
In conclusion, both indoor and outdoor air quality have a significant impact on lung health. Taking individual and collective measures to improve air quality can greatly reduce the burden of respiratory illnesses caused by pollution, improving the quality of life for millions worldwide.
(Author: Dr Manjunath PH, Consultant - Interventional Pulmonologist, Gleneagles BGS Hospital, Kengeri, Bengaluru)
