Purog Kangri is located in Changtang National Nature Reserve in Tibet. It has an altitude between 6,000 and 6,800 meters above sea level and covers an area of more than 400 square kilometers. It is the world’s largest low- and mid-latitude glacier and the third largest after the Antarctic and Arctic glaciers.

Glaciers are indicators of climate change. They are also important source of water resources in many regions and an important contributor to sea level rises. In recent years, with global warming, the water storage capacity of Purog Kangri has also changed. The second comprehensive science investigation of the Qinghai-Tibet Plateau found that since 1976, the Purog Kangri Ice Sheet has retreated about four meters per year, and the total area has decreased by about five percent.

In order to protect the Purog Kangri Ice Sheet, Tsonyi County, Nagchu, Tibet has banned tourism development on the Purog Kangri Ice Sheet. Purog Kangri and its surrounding protected areas have once again become a paradise for wildlife.