The conversation between human and AI assistant.
What possible causes of lung cancer are there besides smoking?
I never knew that. And what about secondhand smoke? How much does it increase the risk of lung cancer?
Breathing in secondhand smoke, or passive smoking, can increase the risk of lung cancer by up to 30%. This is because the smoke contains over 70 known carcinogens (cancer-causing substances) which can damage the cells in the lungs and lead to cancer.