Po River Valley Smog (NASA, Italy Fall/Winter 1997). The snow capped higher
elevations of the Italian, Swiss, and French Alps mountains provide a natural
barrier to the outward migration of smog shown here filling the Po River Valley
of northern Italy. This southwest-looking view shows a dense sea of air
pollution that is trapped from time to time by air stagnation in the heavily
industrialized Po River Valley. The picture shows that air pollution even
infiltrates the numerous mountain valleys that surround this river basin. The
smog appears to be less dense towards the eastern side of the basin where the
terrain is visible though the hazy-looking atmosphere. A small section of the
Rhone River Valley can be traced through the Swiss Alps near the right edge
(middle) and the small patch of whiteness along the right edge (middle) is a low
deck of clouds over Lake Geneva.
Bottna. Small towns dot the coastline in
the west of Sweden. It is a popular destination for tourists in the summer.