The major cause of lung cancer is smoking. The chemicals in cigarette are carcinogenic. Tobacco usage also contributes to lung cancer. Whereas other reasons can be
• radon gas
• asbestos,
• viruses,
• Particulate matter.

TAGS: 1. what are the symptoms of lung cancer
2. what are the effects of lung cancer
3. what are the types of lung cancer
4. what are the results of lung cancer
5. what are the consequences of lung cancer