Salt storms near the Aral Sea pose a serious health hazard to surrounding areas.

Though still dangerous, it posed less of a threat to populated areas.

Testing confirms that these methods allow chemicals to evaporate, contaminating the surrounding atmosphere and posing a health risk not only to laboratory workers, but to neighboring areas.

Avalanches in the northeast sometimes pose a threat to populated areas.

It's not like opposing nuclear reactors or toxic waste dumps, each one of which poses new risks to new areas.

The discharge of salty drainage water may pose "environmental problems" to downstream areas.

In light of the hazards that Merapi poses to populated areas, it has been designated as one of the Decade Volcanoes.

Large volcano-associated debris flows, known as lahars, can pose a threat to populated areas downstream from glaciated volcanoes.

The report also identifies the prime threats posed to such areas by proposed activities such as mining, development and acid rain pollution.

Like other rivers and streams, the Neshaminy Creek poses a flooding threat to neighboring areas in times of rapid downpours.