Credit: Jacques Descloitres, MODIS Rapid Response Team, NASA/GSFC
Across eastern China, the increased use of coal and wood for heating in the winter often leads to widespread haze, such as that seen in this Moderate Resolution Imaging Spectroradiometer (MODIS, [1]) image from the Terra satellite [2] on February 9, 2004. The topography contributes to the effect, as this region is very bowl-like and ringed by mountainous terrain to the west, which prevents the pollution from dispersing.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [4]