In recent weeks, one of the most pristine Himalayan rivers has mysteriously turned black when entering India from Tibet, highlighting how China's upstream tunneling, damming and mining activities might be causing major environmental contamination. The plight of the Siang, the central artery of the Brahmaputra river system -- the lifeline of northeastern India and Bangladesh -- is a stark reminder that transboundary river water issues in Asia are no less important than the regional maritime issues of the South and East China seas and the Indian Ocean, which have attracted greater global attention.
Freshwater, or water that is not salty, is a life-supporting resource. But it is increasingly in short supply in Asia. Although home to 60% of the world's population, Asia has less freshwater per capita than any other continent. Its annual freshwater availability of 2,697 cubic meters per person is less than half the global average of 5,829 cubic meters. Yet Asia has experienced the world's most rapid growth in freshwater withdrawals from rivers, lakes and aquifers since its economic rise.
