Item 5 How many of the chemicals created when tobacco burns are known to cause cancer? about 30 about 50 about 70 about 90
2 answers:
Answer:
about 70
Explanation:
At least 69 of these chemicals are known to cause cancer, and many are toxic.
Answer:
70
Explanation:
tobacco smoke is made up of more than 7000 chemicals, including over 70 known to cause cancer (carcinogens)
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