clearly meeting this goal will entail stepping up the pace of shortterm efforts to achieve the millennium development goals as they are defined today this is a necessary prerequisite to full implementation of a green and sustainable economic model in terms both of social inclusion and of economic development consequently it would not be usd billion in grants that would have to be harnessed for africa but at least some billion throughout the world the amount currently wasted in the water sector through lack of efficiency was evaluated in a report by the world bank and the french development agency at around usd billion