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The Earth's icy poles, sensitive to changes in climate themselves, also have an enormous impact on the world's environment. Scientists are working to better understand these remote regions in unprecedented ways during the next two years, March 2007-March 2009. Study: Arctic Sea Ice at Second-lowest Level on Record September 4, 2008 UPDATE The Arctic ice cap has melted to a point that exceeds the 2005 level -- previously the second lowest on record -- and could surpass the record this year, scientists at the U.S. National Snow and Ice Data Center have said. Resource: National Snow and Ice Data Center Countries Map Arctic in Quest for Resources UPDATE Various countries are scrambling to establish rights over the valuable natural resources hidden under the Arctic sea floor by mapping the vast underwater landscape. Resource: Center for Coastal & Ocean Mapping Joint Hydrographic Center's Arctic mapping project Scientists Plot Pollutants' Path at the Arctic REPORT The Arctic is a receptacle of the planet's air pollutants and a coordinated international effort is geared toward learning more about pollutants' effects at the top of the globe. Slide Show: Learn more about some of the Arctic field studies here.	Main: Polar Discoveries   Researching the Poles   Environmental Impacts   Antarctica: Who's in Charge?   Slide Show: Dry Valley Organisms   Tools of Polar Research   Profiles of Researchers   Archive   Lesson Plan   Exploring Polar Oceanography   Research and Tourism in Antarctica The Global Warming Debate In-depth coverage of global warming, related research and policy decisions International Polar Year More about the IPY, research projects, and educator tools

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