File:Earthatmosphere iss23 annotated nasa.jpg

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Earthatmosphere_iss23_annotated_nasa.jpg(657 × 329 pixels, file size: 24 KB, MIME type: image/jpeg)

http://www.greenpolicy360.net/w/Thin_Blue_Layer

http://en.wikipedia.org/wiki/Troposphere

The average depth of the troposphere is approximately 17 km (11 mi) in the middle latitudes. It is deeper in the tropics, up to 20 km (12 mi), and shallower near the polar regions, approximately 7 km (4.3 mi) in winter.

http://en.wikipedia.org/wiki/Atmosphere_of_Earth

The atmosphere has a mass of about 5.15×1018 kg,[2] three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface.

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current11:11, 10 December 2014Thumbnail for version as of 11:11, 10 December 2014657 × 329 (24 KB)Siterunner (talk | contribs)Category:Green Graphics