Peter Dovak, a graphic designer with a penchant for depicting rapid transit systems, has created this amazing animated GIF showing the expansion of subways in China and Taiwan from 1990. And they are still expanding. Changsha alone has opened only two of the five subway lines planned. Jshou, on the other hand, must struggle along with taxis and buses.
Randall Munroe (Mr. xkcd) has posted a useful, informative chart about radiation exposures. Considering all the worldwide kerfluffle about radiation hazards from Japan, which will be almost nil for people thousands of miles away, reviewing the chart may make this complex subject more understandable.