The number teenagers becoming addicted to smoke is heavily increasing.
The number
of teenagers becoming addicted to smoke is heavily increasing.
Furthermore, many teens becoming addicted to smoking out of curiosity.
Furthermore, many teens
have become addicted to smoking out of curiosity.
When a 16 years old teenager see a man and women smoking around the corner or in the bus stop,
When a
16-year-old teenager see a man
or a woman smoking around the corner or
at the bus stop
In conclusion, an increasing number of teens becoming addicted to smoking
I think it would rather be "The number of teens becoming addicted to smoking is increasing..."
That quoted phrase should be the sentence so that it can better go along with the following sentence.