Selenium in global food systems.

British Journal of Nutrition (2001), 85, 517-547.pdf.

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Global Conveyor Belt

National Oceanic and Atmospheric Administration (NOAA): Currents, U.S. government’s official web portal.

Global Peatland CO2 Picture 2009

Greifswald University http://unfccc.int/files/kyoto_protocol/application/pdf/draftpeatlandco2report.pdf.

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