With drought-stricken California enjoying its wettest winter in decades, it can be easy to forget that water scarcity is among the globe’s most deadly threats. This week on Sea Change Radio, we discuss groundwater with Bill and Rosemarie Alley, the authors of High and Dry: Meeting the Challenges of the World’s Growing Dependence on Groundwater. They take us on a journey around the world and back in time to examine how humans scheme for and squander earth’s most precious resource. We talk about wildcatting for water in the 19th century, India’s water management quandary, and some of Saudi Arabia’s more imprudent water policies.