Yaks Foil Tracks
Guardian Unlimited | Special reports | Yaks threaten China's 'miracle' train line
As well as the yaks, Tibet has found a most unlikely ally in the struggle against the Han influx:
The line depends on coolants to stop the ice upon which it rests from melting. But global warming has raised temperatures in the mountain region faster than expected. As well as damaging concrete pillars and bridges, it has added to the problem of sand dunes that encroach upon the track.
