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</html><thumbnail_url>https://www.cec.org/wp-content/uploads/2098-mercury-in-great-lakes-basin-final-report-en.jpg</thumbnail_url><thumbnail_width>465</thumbnail_width><thumbnail_height>600</thumbnail_height><description>Mercury is a toxic element whose unique properties make it one of the most useful and pervasive substances, and as such, concentrations in places around the world have risen to levels of concern. The Great Lakes is one such place. There have been intensive efforts by many government and international bodies to reduce the use and emission of mercury to the environment.</description></oembed>

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