Browsing: Environment

Photo: Chris Vees Dear EarthTalk: To what extent is Antarctica really melting and what impact might it have on coastlines around the world? — Andrea Hutchinson, Cary, NC The Antarctic continent, roughly the size of the United States and Mexico combined, is composed of rock covered by glaciers some 16,000 feet thick. The glaciers form from fallen snow compacting into successive layers of ice, and they eventually move downhill toward the coasts and “calve” into the ocean as icebergs and eventually melt out into the sea. Antarctica and Greenland combined hold about 99 percent of the globe’s freshwater…

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