1.   It is known, for example, that there are serious risks in heavy smoking during pregnancy.

2.   She has a bad cough, caused by heavy smoking.

3.   As with other respiratory and upper gastrointestinal tumours the male predominance seen is probably a result of the heavy smoking and drinking habits of men compared with women.

4.   The health problems attributed to air pollution may in part be due to heavy smoking, Hughes adds.

5.   But heavy smoking leads to precancerous changes that lower amounts of the protein.

6.   He once quit for nine months after a lung collapsed due to his heavy smoking.

7.   In recent years, research has shown a strong link between heavy smoking and drinking.

8.   Sarah has also had problems with depression, heavy smoking and alcohol abuse.

9.   Gul Mohammed was admitted to a local hospital five months ago with breathing problems worsened by heavy smoking.

10.   Heavy smoking is not advised for the altitude-impaired.