Essays / "why do student smoke" - how to start this argumentative essay? [5]

it is very big problem in our modern world students smoke cigarette.in American scients say that 60% students smoke cigarette.----general information
According some people it is modern world and they say it is not big problem-----counter argument(but i did not write EXPLANATION)
However i strongly believed that it cause tv reklam,modern,they look like big maybe)))))-----thesis