Start Date: End Date: Published Date Data Date
Data acquired January 1, 2001 - December 31, 2006 720 x 360 PNG
Data acquired January 1, 2001 - December 31, 2006 3600 x 1800 3 MB - PNG
342 x 171 JPEG
Solid particles and liquid droplets in the air come in a range of sizes, but those smaller than 2.5 micrometers pose the greatest risk to human health.
NASA map by Robert Simmon, based on data from the Multi-angle Imaging SpectroRadiometer (MISR) and the Moderate Resolution Imaging Spectroradiometer (MODIS) on Terra and on the GEOS-Chem model. Caption by Holli Riebeek and Adam Voiland.
Published November 9, 2010 Data acquired January 1, 2001 - December 31, 2006