Which naturally emitted gas, accumulating in indoor spaces, has been linked with lung cancer in humans?
ozone carbon monoxide radon mercury asbestos
The naturally emitted gas that has been linked with lung cancer in humans is radon. Radon is a radioactive gas that can accumulate in indoor spaces, particularly in basements and lower levels of buildings, and long-term exposure to high levels of radon is associated with an increased risk of lung cancer.