There are 80 stages in all, spread over a variety of worlds, and introducing new enemies and hazards as the game progresses.

Captain Mackey, his executive officer, and Cheyenne's navigator all knew that this would introduce additional hazards to their mission.

The surrounding streets can sometimes introduce disturbing hazards, like the rattle of occasional gunfire.

While we began our investigation with such questions as: would "safer" substitutes introduce new hazards?

But paradoxically, experts say the changes could also introduce new risks by possibly introducing new hazards accidentally as others are eliminated.

But the procedure does introduce novel hazards.

Later levels introduce other creatures and hazards, but the essential gameplay remains the same throughout the game.

This required more wires to lay and maintain, wasting money and introducing unnecessary hazards.

Given the consensus among the scientific community that genetic engineering can potentially introduce hazards, such as allergens or toxins, GE foods need to be evaluated on a case-by-case basis.

Those who are concerned about lead sometimes remove it in ways that introduce even further hazards.