1.   At worst, it could have been a serious health risk or even life-threatening.

2.   Being somewhat overweight is not a serious health problem, and obesity is not a terminal illness.

3.   Cigarettes are acknowledged as a serious health risk and the main cause of lung cancer.

4.   Garbage that is left uncollected becomes a serious health hazard.

5.   Meat from the infected animals is regarded as a serious health risk.

6.   Other research has also confirmed that women risk serious health hazards by repeated childbearing.

7.   Pollution in the atmosphere causes serious health problems for many people.

8.   The flood of toxic chemicals creates even more serious health problems in this brave new workplace.

9.   Air pollution is a serious health hazard.