Fires are believed to be one of the most important threats to nuclear reactors.

This battle marked the end of Japanese sea power as an important threat.

They summarize the measures and most important threats for individual components.

Today climate change is the biggest and most important threat to the wetlands.

Pollution is seen as the single most important environmental threat by 62 percent of the adults surveyed.

An important threat to the survival of this species is habitat loss.

The most important threat to security, he said, is sending confidential information by e-mail message.

Many countries considered communism as the most important threat.

My concern now was the lesser but still important threat of vitamin deficiency.

Degradation of the habitat is now the most important threat to the species.