HELENA, Mont. - After thousands of snow geese died in the toxic water of a former open-pit mine in Montana last fall, the companies responsible for the pit are bringing out the big guns. Literally.
Montana Resources and BP-owned Atlantic Richfield Co. are proposing to use four noise-making propane cannons on tripods that would be triggered by long-range motion sensors as an additional measure to scare birds away from the Berkeley Pit, part of the nation's largest Superfund site.
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