The 2006 Human Development Report focuses on water and human development. Water is central to the realization of human potential. It is a source of life for people and for the planet. Clean water and sanitation have a profound bearing on health and human dignity. Inequalities in access to clean water for drinking and to water as a productive input, reinforce wider inequalities in opportunity. With competition for water intensifying, there is a danger that poor and vulnerable communities will become increasingly marginalized. The twin challenge facing governments and donors is to accelerate progress towards universal access to water and sanitation; and to ensure that water management policies strengthen the rights of poor households to access water resources.