There is an emerging consensus that an increasing part of water security challenges will have to be met in the coming decades in cities and megacities,where most people will live,the most water will be consumed and most of the pollution will be generated.

• 人们逐渐形成一项共识，认为在即将来临的数十年中，在那些将有最多人居住、将消耗最多水和将产生最多污染的大小城市和特大城市中，势将应付越来越多的水安全挑战。