topic (global dimming) has already been mentioned on SB twice, once on Stoat,
once on Living
the Scientific Life. Others have picked up on it,
among others). It was featured in a news article here.
The Nova video that was linked to on Living the Scientific
Life is “no
longer available,” but Nova has other features on the subject, on their
Plus, there is a copy of a BBC feature on the subject here:
though the topic has been covered by others, I think the video is
sufficiently compelling that it is worth highlighting…
The basic idea is this: particulate pollution and jet aircraft
contrails have combined to reduce the effect of global warming.
This suggests that the models used to understand global
warming need to be revised. There are several lines of
evidence that indicate this is true. The implications are
bad. There is reason to believe that it has already led to
the deaths of millions of people.
I need not belabor the point: the emotional message is carried in the
video, and the technical details are covered well in the Wikipedia
entry on global