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This image shows the distribution of ammonia over North Italy in 2008, as measured by the Infrared Atmospheric Sounding Interferometer (IASI) instrument on the MetOp satellite. The yellow to red colours indicate areas with high concentrations of ammonia.
CREDIT
ULB, CNES and INSU-CNRS (Image MODIS copyright L. Gonzalez/C. Deroo LOA)