Lung cancer is increasing among people who have never smoked, according to a major international study. Researchers believe air pollution may be a significant factor.
Scientists found that adenocarcinoma is now the most common type of lung cancer worldwide. This form of the disease is more often seen in non-smokers and has overtaken types traditionally linked to cigarette use.
Experts estimate that roughly one-third of global adenocarcinoma cases may be connected to air pollution. Even low exposure to pollution from traffic and fossil fuels can raise the risk. The World Health Organization reports that most of the global population lives in areas where air quality does not meet recommended standards.
Although men still account for more overall lung cancer cases, adenocarcinoma is more common in women. Researchers suggest that indoor air pollution, including cooking fumes and solid fuel use, may contribute to this trend.
As smoking rates continue to decline worldwide, more lung cancer cases are being diagnosed in people who have never smoked. This shift makes prevention and early detection even more important.
Common symptoms include a persistent cough lasting more than three weeks, shortness of breath, chest pain, coughing up blood, fatigue, and unexplained weight loss.
Anyone experiencing ongoing symptoms should seek medical advice. Early diagnosis significantly improves treatment outcomes.