Nancy Castaldo’s Latest Book Offers Kids Environmental Solutions, Hope ‘Before’ the World Runs Dry

Although World Water Day and Earth Day are in the rearview, Nancy Castaldo hopes you won’t shift your attention from the fate of the planet just yet. In her latest book, When the World Runs Dry: Earth’s Water in Crisis, published in January, she dives into global water security—or, more aptly, the lack thereof—tackling infrastructure, pollution, fracking, and more.