What is radon and how does it impact cancer risk? Radon is a radioactive gas released from soil or rock commonly found in basements or workplaces. It can be associated with an increased risk of lung cancer. Fortunately, the level of radon required to cause cancer is usually higher than what most people are exposed to. Have a question about cancer risk and prevention? Comment below or email us at communication@dfci.harvard.edu. We'll try to address your question in a future episode. Like and shar