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  • Understanding Global Change

    Understanding Global Change

    Click & Learn

    This interactive tool allows students and educators to build models that explain how the Earth system works and how it is affected by human activities and nonhuman phenomena.

  • The Geologic Carbon Cycle

    The Geologic Carbon Cycle

    Animations

    (6 min 20 sec) CO2 emitted by volcanoes into the atmosphere is removed by a series of chemical reactions related to rock weathering.