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Antarctic Sea Ice
September 1999 & February 2000
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September 2000 & February 2001
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September 2001 & February 2002
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September 2002 & February 2003
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September 2003 & February 2004
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September 2004 & February 2005
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September 2005 & February 2006
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September 2006 & February 2007
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September 2007 & February 2008
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September 2008 & February 2009
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World of Change
El Niño, La Niña, and Rainfall
Severe Storms
Evaporation of the Aral Sea
Burn Recovery in Yellowstone
Global Biosphere
Antarctic Ozone Hole
Amazon Deforestation
Antarctic Sea Ice
Arctic Sea Ice
Water Level in Lake Powell
Mesopotamia Marshes
Solar Activity
Urbanization of Dubai
Earth Observatory 10th Anniversary
