Table 1.
Known causes of lung cancer and pathways of exposure.
| Inhalation | |
| Arsenic | Mustard Gas |
| Asbestos | Nickel |
| Beryllium | Radon |
| Bischloromethyl ether | Silica |
| Cadmium | Tobacco smoke |
| Chromium | |
| Ingestion | |
| Arsenic |
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