Scottish historic sites threatened by global warming

Nearly one third of Scotland's 35,000 historic sites, including Skara Brae, are threatened with destruction due to coastal erosion.

Archaeologists and environmentalists are racing to salvage artifacts from ancient sites before the ocean swallows them forever.

"With every winter storm, more damage is done to some sites. It gets to a point where it is not worth doing anything to the site because there is not much left to salvage. Once erosion starts it is pretty quick and you can lose [a site] to erosion in five years easily," said Tom Dawson, a research fellow at the environmental history department at St Andrews University. Global warming is blamed for much of the destruction.