Impressive footage has emerged of melting permafrost slowing churning up grassland on the Tibetan Plateau. <br /><br />The video, filmed in Yushu Tibetan Autonomous Prefecture in China's southwestern Qinghai Province on September 7, shows mud and grass being churned up in a process known as solifluction phenomenon.<br /><br />It happens because permafrost is impermeable to water - any soil on top of it may become waterlogged and slide downslope due to gravity. <br /><br />Several families and a farm were affected by the incident. <br /><br />The farm has had to relocate.
