Answer:
growth of the teeth
Explanation:
it might be that the teeth are not complete, so maybe they are growing around that part. it might also be due to excessive chewing of gum
Tar is present in any tobacco product that is burned.
The last puffs on a cigarette can contain as much as twice the amount of tar as the first puffs. Tar in cigarette smoke paralyzes the cilia in the lungs and contributes to lung diseases such as emphysema, chronic bronchitis, and lung cancer.
A milligram is 0.001 grams, so if the concentration is 0.02mg/L, it is 0.00002g/L. Therefore, the concentration is 0.00002/1, which can be converted to <span>2 grams per 100,000 liters, or 0.002%.</span>