Groundwater and Global Change calls attention to groundwater, a resource poorly understood by the general public and most water opinion-leaders and decision-makers. It aims to enhance awareness of this resource and increase knowledge on how to better use and protect it, including taking optimal advantage of groundwater’s unique buffer capacity, which may mitigate problems resulting from increasing demographic, economic, environmental and climate change pressures. The publication highlights the groundwater issues that deserve to be taken into account in the international water agenda, and hopes to contribute to the correct understanding of these issues in order to improve decisions on programming and financing global water resources initiatives.