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  Research Highlights the Need for Further Studies on Air Pollution and Other Contributing Factors The number of people diagnosed with lung cancer who have never smoked is on the rise, with air pollution identified as a significant factor, according to the World Health Organization’s cancer agency. Lung cancer among individuals who have never used cigarettes or tobacco is now estimated to be the fifth leading cause of cancer-related deaths worldwide, as reported by the International Agency for Research on Cancer (IARC). The IARC noted that nearly all cases of lung cancer in non-smokers manifest as adenocarcinoma, which has become the most prevalent of the four primary lung cancer subtypes in both men and women globally. A study published in The Lancet Respiratory Medicine journal indicated that in 2022, approximately 200,000 adenocarcinoma cases were linked to air pollution exposure. The highest incidence of adenocarcinoma attributed to air pollution was recorded in East Asi...