Whatever the impacts on water systems, the task of achieving water quality objectives in agriculture will become more difficult in the coming years as a result of climate change (OECD, 2012b). These people will have very little room of manoeuvre to adjust to uncertain water availability. The country groupings BRIICS and RoW are explained in OECD (2012a), Table 1.3. The increase in demand will come mainly from manufacturing, electricity and domestic, leaving little scope for increasing water for irrigation.