China's Environmental Record

What pollution problems affect the major rivers of China? Why?
Why does China refer to Tibet as China's Water Tower Number One?
What happened to the plentiful wildlife of Tibet after Chinese invasion in 1950?
Starting around the 1960s, an experimental agricultural policy to replace traditional barley crops with wheat resulted in complete disaster. What happened?
What experimental policies in agriculture are currently pursued by Chinese authorities within Tibet?
At the eastern slopes of the Tibetan plateau, major deforestation has taken place since 1950. How much? With what impact?
Desertification is becoming a huge problem in northern China. What has happened to the grasslands of these regions?