What are other causes of lung cancer besides smoking?

Question by XemogirlX: What are other causes of lung cancer besides smoking?
My aunt died of lung cancer about a year ago. I didn’t understand how she got lung cancer. She was 5′,6″, she travel a lot, and did not smoke. Can anyone help?

Best answer:

Answer by jilllpilll
depending on how old she was, she was probably exposed to a great deal of second hand smoke
which can kill you just as fast

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