Time Magazine: The Songhua incident is a reminder that in Asia, a region of the world where water is often scarce and often polluted, managing that indispensable resource is vital. Asia is already the world’s driest inhabited continent per capita, and as its population, urbanization and dirty industrialization grow — and global warming dries out the region — clean water will only become more precious. As a just-released report by the Asia Society argues, water will become the key to regional security in …