Addressing the shortfall, commissioned by WaterAid and written by Development Initiatives, puts the water and sanitation sector resourcing under the spotlight and argues that donor countries should act with urgency to increase their financing and better target their money at the 783 million lacking water and the 2.5 billion lacking sanitation. This report aims to complement UN Water's 2012 GLAAS report by putting resourcing of the water and sanitation sector - specifically the role of Official Development Assistance, or aid - under the spotlight. In particular, it argues that donor countries should act with urgency to improve their support to those who face water and sanitation poverty on a daily basis though increased financing that is better targeted towards the world's poorest people who lack these essential services.