1.   Although it is not clear how much of a safety hazard the tool posed during the two years it went undetected in the rudder of plane No.

2.   He claimed the plan failed to address health hazards posed to residents living near large industrial complexes.

3.   Health experts said that the suits worn by cleanup crews reflected the substantial hazard posed to people who work with asbestos or chemical contamination on a daily basis.

4.   Those hazards pose a herculean task put mostly to the same institutions that spoiled the environment in the first place.

5.   Scientists John Stavrides and George Deliconstantinos devised the filter in a five-year research quest to limit health hazards posed by smoking.

6.   The EPA is striving to contain whatever danger the remaining environmental hazards pose.