These began showing up about ten years ago, and Everett Griner tells us what is suspected of causing this abnormality. Everett also gives us some statistics about this and just what might be causing some of this problem. 
 Report (1:00 mp3)
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These began showing up about ten years ago, and Everett Griner tells us what is suspected of causing this abnormality. Everett also gives us some statistics about this and just what might be causing some of this problem.  Report (1:00 mp3)