Environment Week 2011
Celebrate Earth Day with Britannica!
![Image credit: justaa/Shutterstock.com](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/earthday_mainimage2.jpg)
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Grand Canyon and Kamchatka (Celebrating National Park Week)
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John Muir: A Lifetime of Conservation
![Muir in Muir Woods, Calif., U.S. (c. 1902). H20557/Library of Congress Muir in Muir Woods, Calif., U.S. (c. 1902). H20557/Library of Congress](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/Muir-in-Muir-Woods.jpg)
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Point Reyes, the Indiana Dunes, and the Central Alps (Celebrating National Park Week)
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/Mesa-Refuge-2-012-11.jpg)
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Vicksburg, Central High, and West Lake (Celebrating National Park Week)
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/Vicksburg.jpg)
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Deepwater Horizon Oil Spill: One Year Later (Picture Essay of the Day)
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/deepwater1.jpg)
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The Incredible Shrinking Aral Sea
![Area once covered by the Aral Sea in Kazakhstan.](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/0000124354-ihop04489-004.jpg)
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Endangered Estuaries
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/chesapeakebay.jpg)
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Shenandoah and the Lake District (Celebrating National Park Week)
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/20080715_Virginia_0024-11.jpg)
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Environment Week 2011 on the Britannica Blog
![](https://web.archive.org/web/20130214201109im_/http://www.britannica.com/blogs/wp-content/uploads/2011/04/Explore.jpg)
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