BI-2245
Effects of tobacco smoke
Biology · Secondary 4 · Medium · Effects of tobacco smoke
A survey records lung cancer deaths per 100 000 people in a country. The rate is 12 for non-smokers and 180 for heavy smokers.
What is the best conclusion from these data?
What is the best conclusion from these data?
- Non-smokers never get lung cancer.
- All lung cancer patients must be heavy smokers.
- Smoking increases the risk of getting lung cancer.
- Smoking is the only cause of lung cancer.
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