Natural hazards: continuous permafrost in north is a serious obstacle to development; cyclonic storms form east of the Rocky Mountains, a result of the mixing of air masses from the Arctic, Pacific, and North American interior, and produce most of the country's rain and snow east of the mountains
Definition: This entry lists potential natural disasters.
Source: CIA World Factbook - Unless otherwise noted, information in this page is accurate as of April 17, 2002
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