Times (UK): Fly over Mongolia in summer and the steppes look as green as they must have done when Genghis Khan and his armies galloped across the land — but the switch is startling as the flight crosses the border into China’s Inner Mongolian region. The ground suddenly turns brown. The danger facing Mongolia is that its steppes may be transformed into a desert similar to the one eating away at neighbouring China. The culprit is the humble goat — and the fascination of fashionistas for …