Figure 14.2
Figure 14.2. Soot-darkened snow in the vicinity of the
Siberian city of Troisk (54°N, 61°E), as seen from the
space shuttle. Troisk, an industrial city situated just east of
the Ural Mountains, has been cited as one of the worst
industrial-polluted cities in Russia. Respiratory diseases are
chronic among its citizens (courtesy of NASA).