Question

why do we need to preserve yak

Answer 1

Yak play an important economic and societal role for the native people of Tibet and Southern China.  95% of the worlds existing Yak population lives in the Qinghai-Tibetan Plateau. This yak population are an irreplaceable resource for the native populations.  Due to the yaks ability to survive harsh winter, they account for 90% of the livestock for people in the Qinghai-Tibetan Plateau. In addition to being livestock, yak by products also provide cloth, shelter, food, and travel for native peoples.