Global warming danger to Siberian buildings

YAKUTSK, Russia - Eduard Romanov points to a spot on a block of flats where a major supporting beam has sagged and begun to crack, destabilizing the nine stories of apartments above.

In Russia's Siberian city of Yakutsk, one of the coldest on Earth, climate change is causing dangerous melting of the frozen ground, or permafrost, on which the buildings stand.

"Since the year before last, the building has started to list and has tilted about 40 centimeters," says Romanov, a construction worker and environmental activist.