Mongolia's capital tries to shed its smog

ULAN BATOR (Reuters) - Inside a stove showroom deep in the suburbs of this sprawling smoke-filled city, Mam Ivermint, 80, is shopping for a new coal-fired stove -- her unlikely contribution to the cause of cleaner air.

The cast-iron stove she selects is low tech, but very different from the traditional Mongolian heaters responsible for spewing much of the grit that fills Ulan Bator's skies, making it the world's second-most polluted city. It includes features that cut smoke emissions by 80 percent.