File:Ozone hole area.jpg

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DescriptionOzone hole area.jpg	This image shows the growth of the average area of the ozone hole from 1979 to 2004 using data from Version 8 of the TOMS algorithm. We define the ozone hole as the area for which ozone is less than 220 Dobson Units, a value rarely seen under normal conditions. It shows that the ozone this low hardly occured at all in 1980, but by year 2000 covered an area larger than North America, 26.5 million square kilometers. (orginal caption)
Date	2004
Source	http://toms.gsfc.nasa.gov/multi/multim.html ([1])
Author	NASA
Permission (Reusing this file)	Public domain (created by NASA)

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	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[2] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [3] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [4] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	09:19, 6 May 2006		792 × 611 (82 KB)	Laurentius (talk \| contribs)	{{Information\| \|Description = This image shows the growth of the average area of the ozone hole from 1979 to 2004 using data from Version 8 of the TOMS algorithm. We define the ozone hole as the area for which ozone is less than 220 Dobson Units, a value

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File:Ozone hole area.jpg

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