Start Date: End Date: Published Date Data Date
Data acquired 1998 - 2000 720 x 415 JPEG
Data acquired 1998 - 2000 2000 x 1333 975 KB - JPEG
Data acquired 2010 - 2012 720 x 415 JPEG
Data acquired 2010 - 2012 2000 x 1333 946 KB - JPEG
720 x 480 JPEG
Improved data from several satellites illustrates how concentrations of fine particulate pollution have changed over time.
NASA Earth Observatory maps by Joshua Stevens, using Global Concentrations of Fine Particulate Matter data from van Donkelaar et al. (2015). Caption by Adam Voiland, with assistance from Aaron van Donkelaar (Dalhousie University) and Randall Martin (Dalhousie University).
Published June 24, 2015 Data acquired 1998 - 2012