| Summary: | Ice has long shaped our planet. Many of the landscape features we seetoday are the result of its actions over thousands or millions of years. Thishas long been known; but in the Anthropocene we understand that,through our production of greenhouse gases, humans also shape ice—notthe ice in trays in our refrigerators, but the glaciers that produce our rivers,the sea ice that impacts our ocean currents and the enormous ice shelvesthat hold the vast majority of our planet’s freshwater. While humans havealways encountered and interacted with ice, understanding this relationshiphas taken on a new urgency in the twenty-first century.
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