Causes Of Lung Cancer
Lung cancer was the most common cause of cancer deaths worldwide in 2020, accounting for 1.80 million deaths. Cigarette smoking is the leading cause of lung cancer. Other causes include use of tobacco products, secondhand smoke, exposure to substances such as asbestos or radon, and having a family history of lung cancer.
Radon is considered the number one environmental cause of any cancer. It causes between 3 per cent to 14 per cent of all lung cancers in a country, as per WHO estimates. In the United States, radon is identified as the second leading cause of lung cancer, after smoking. According to the country’s Environmental Protection Agency (EPA), as many as 21,000 radon-associated lung cancer deaths are recorded every year.