During the last weeks of March 2003, unusually high and widespread aerosol pollution was detected over Europe by a number of satellite sensors. The sensor provides a new angle on the problem of particulate pollution.This true-color image of central Europe shows an atmospheric low-pressure system centered just south of the Baltic Sea. There is widespread aerosol pollution (gray pixels) over the region that appears to be converging on the low-pressure center. The northern and eastern Gulf of Bothnia, the Gulf of Finland, and the Gulf of Riga remain covered by ice. Italy, Greece and Turkey are visible.