Schoolchildren ordered indoors as air pollution cloaks Shanghai
I wonder how this compares to the worst smogs experienced in London and elsewhere before the West got its act together with regard to particulate pollution. Apparently the Great Smog of 1952 killed on the order of 10000 people in just a few days. I'm not sure many young people nowadays realize how horrible the situation was just half a century ago.[1] http://en.wikipedia.org/wiki/Great_Smog_of_1952