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  • Global warming - Wikipedia, the free encyclopedia

    http://en.wikipedia.org/wiki/Global_warming - 21 hours ago

    Global warming is the observed century-scale rise in the average temperature of
    Earth's climate system. Since 1971, 90% of the increased energy has been ...

  • Global Warming Facts, Causes and Effects of Climate Change | NRDC

    http://www.nrdc.org/globalwarming/

    NRDC: NRDC provides facts on global warming, causes of global warming,
    climate changes effects and offers solutions to the problem.

  • Global Warming -- National Geographic - Environment

    http://environment.nationalgeographic.com/environment/global-warming/

    The current cycle of global warming is changing the rhythms of climate that all
    living things have come to rely upon. What will we do to slow this warming?

  • Global Warming | Union of Concerned Scientists

    http://www.ucsusa.org/global_warming

    Global warming is already having significant and harmful effects on our
    communities, our health, and our climate. Sea level rise is accelerating. The
    number of ...

  • Global Warming: Introduction | Monitoring References | National ...

    http://www.ncdc.noaa.gov/monitoring-references/faq/global-warming.php

    A general overview of global warming and the science behind its understanding.

  • Global Warming & Climate Change

    http://topics.nytimes.com/top/news/science/topics/globalwarming/

    Global warming is melting glaciers that define Glacier National Park in Montana
    and threatening to strip park of its identity; park was once home to 150 ice ...

  • Global Warming: 2014 Articles, Facts, Causes & Effects - LiveScience

    http://www.livescience.com/topics/global-warming/ - 11 hours ago

    The latest articles and facts about global warming and its causes, plus a look at
    the effects of climate change: rising sea level and severe weather.

  • GlobalWarming.org — Climate Change News & Analysis

    http://www.globalwarming.org/

    2 days ago ... In what the Wall Street Journal calls a “setback for the Obama administration,” the
    Supreme Court today announced it will review a challenge by ...

  • Global Warming - National Wildlife Federation

    http://www.nwf.org/wildlife/threats-to-wildlife/global-warming.aspx

    Global warming is quickly becoming the biggest threat to the long-term survival of
    America's wildlife. Average temperatures in the U.S. over the last century have ...

  • Home | Climate Change | US EPA

    http://www.epa.gov/climatechange/

    Official government site provides comprehensive information on the issue of
    climate change and global warming including climate change science, U.S.
    climate ...