All of us all know that smoking is humful for people's health.But less of us konw the reason why it is humful.The reason as follow:
  First,if people have disease,they shouldn't smoke any more.Because smoking will the medicine effect ,then mislead the patient's candition.It is a serious for treating people's disease.
  Second,It not only easy to get the lung disease but also easy to educe the rascular cancer、diabetes With more and more pepole smoking, the tobacco has become the second skill after high blood pressure.
  Third, smoking only ont smoker personal thing it will effect surrounding people.The pasosiver respiratory's health will be effected.
  It is said that whole wold has about 5 millions peoples dead for smoking every year.So, for the human's health,we should ban the smoking.