File:Globalndvi tmo 200711 lrg.jpg

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English: Normalized Difference Vegetation Index (NDVI) from November 1, 2007, to December 1, 2007, during autumn in the Northern Hemisphere.
Food, fuel, and shelter: vegetation is one of the most important requirements for human populations around the world. Satellites monitor how “green” different parts of the planet are and how that greenness changes over time. These observations can help scientists understand the influence of natural cycles, such as drought and pest outbreaks, on vegetation, as well as human influences, such as land-clearing and global warming.
来源 http://earthobservatory.nasa.gov/IOTD/view.php?id=8622
作者 NASA images produced by Reto Stockli and Jesse Allen, using data provided by the MODIS Land Science Team. Caption by Michon Scott.

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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  • 2008-12-10 05:57 Mailseth 3600×1800× (2278654 bytes) {{Information |Description=Food, fuel, and shelter: vegetation is one of the most important requirements for human populations around the world. Satellites monitor how “green” different parts of the planet are and how that greenness changes over time.

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