Coastal erosion is one of the most significant hazards associated with the coast.

"We had no evidence that indicated it was a significant hazard to anyone," he said.

Two of these decay products, polonium-218 and 214, present a significant radiologic hazard.

Materials such as nails, pieces of wood and debris can also represent a significant hazard.

According to current figures, 314 of the 371 dams considered a significant hazard now require repair.

There won't be any significant hazards for another eighty hours.

Rapid boiling will cool the skin and create frost, particularly in the mouth, but this is not a significant hazard.

"So this is not a very significant hazard," he said.

The strength of the field produced by the scanner's magnet represents a significant hazard.

Therefore there is already enough sediment to pose a significant hazard.