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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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  • 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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