Reuters - Thu Sep 8,10:18 PM ET
A general view of Rangeley Lake, which is being monitored for mercury levels, in Rangeley, Maine August 23, 2005. Researchers from the Biodiversity Research Institute in Gorham, Maine, take blood samples from loons to monitor mercury levels in the lake caused by fallout of pollution from the mid-western United States. Picture taken August 23, 2005. (Brian Snyder/Reuters)