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File:Harmful Bloom in Lake Atitlán, Guatemala.jpg

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English: A large bloom of cyanobacteria, more commonly known as blue-green algae, spread across the lake in green filaments and strands that are clearly visible in this simulated-natural-colour image. According to local news reports, the nutrients feeding the bloom in Lake Atitlán come from sewage, agricultural run off, and increased run off as a result of deforestation around the lake basin. The image reveals clearly why run-off would end up in the lake. Mountains and volcanoes encircle Lake Atitlán, ensuring that all rain that falls in the basin flows into the bowl-like lake. Silver-gray settlements, another source of pollution, ring the lake. Deforestation is a little bit more difficult to see. The forest is a darker shade of green than agricultural fields. The contrast between forested land and agriculture is most evident on the slopes of the San Pedro Volcano on the south-west shore of the lake. Large pale green squares cut into the dark green crown over the peak of the volcano.
Date
Source NASA Earth Obsevatory
Author Jesse Allen

Image captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite. Image based on data from the NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team. Instrument: Terra - ASTER.

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Public domain 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.)
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30 November 2009

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current12:38, 30 November 2009Thumbnail for version as of 12:38, 30 November 20091,800 × 1,200 (2.28 MB)Originalwana{{Information |Description={{en|1=A large bloom of cyanobacteria, more commonly known as blue-green algae, spread across the lake in green filaments and strands that are clearly visible in this simulated-natural-colour image. According to local news repor

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