Lung cancer is primarily caused by exposure to harmful substances that damage lung cells. Here are the main causes of lung cancer:
1️⃣ Smoking (Primary Cause – 85% of Cases)
- Tobacco smoke contains over 70 carcinogens (cancer-causing chemicals).
- Both active smoking and secondhand smoke (passive smoking) increase lung cancer risk.
2️⃣ Exposure to Harmful Substances
✔ Radon Gas – A natural radioactive gas that seeps from the ground into homes/buildings.
✔ Asbestos – Found in old buildings, factories, and construction sites.
✔ Air Pollution – Long-term exposure to polluted air can cause lung damage.
✔ Industrial Chemicals & Fumes – Exposure to arsenic, diesel exhaust, and coal smoke.
3️⃣ Genetic & Biological Factors
✔ Family History – If a close relative had lung cancer, your risk increases.
✔ Previous Lung Diseases – Conditions like tuberculosis (TB) or chronic obstructive pulmonary disease (COPD) increase risk.
4️⃣ Lifestyle & Environmental Factors
✔ Poor Diet & Lack of Exercise – Weakens the body’s ability to fight cancer.
✔ Radiation Exposure – From cancer treatments or frequent high-dose X-rays.
🛑 How to Reduce Your Risk
✅ Quit Smoking – The biggest way to prevent lung cancer.
✅ Avoid Secondhand Smoke – Stay away from smokers.
✅ Test for Radon Gas – Especially in workplaces & homes.
✅ Wear Protective Gear – If exposed to industrial chemicals.
✅ Eat a Healthy Diet – Fruits & vegetables boost lung health.