Photo taken on Sept. 8, 2018 shows a lake and snow mountain in Zhongba County in southwest China's Tibet Autonomous Region. (Photo: Xinhua)

BEIJING, May 21 (Xinhua) -- Tibet has become one of the regions "with the best eco-environment in the world," said a white paper issued by China's State Council Information Office Friday.

Tibet's ecosystems are now generally stable. Environmental quality is improving, a green development model is in place, and eco-environmental rights and interests are more secure, according to the white paper titled "Tibet Since 1951: Liberation, Development and Prosperity."