Geothermal has long been hyped as the next big thing in renewable energy, but its breakthrough moment hasn’t happened yet. Barriers to expansion include the elusiveness of sites offering the magic trio of heat, water and permeability and concern for unique ecosystems. Contributor Jessica McKenzie on geothermal energy’s possibilities and challenges and the government funding that may finally fire it up.

When humans began to put down roots, we also started to forge what Giulio Boccaletti calls a “social contract” with water. In his new book, “Water: A Biography,” the London-based scientist explores that relationship through a long historical lens. BookShelf contributor Gary Wilson reviews the volume and finds that political ambitions and economic development are central to the story.

Industrial hog farmers tout swine biogas as a clean, green energy source, but others point to its messy side. A young journalist who investigated the underreported stench of environmental racism associated with this technology learned valuable lessons along the way to producing a feature story that won her a Society of Environmental Journalists’ award for outstanding student reporting.

Abandoned oil and gas wells are found in significant numbers in some 27 states. Reporters who want to track their status can dig into several databases, but will need to support their data crunching with lots of shoe-leather and ground-truth reporting. Reporter’s Toolbox has insights into what the databases offer. Plus, a primer on API numbers.

Two journalists covering water policy used a wide range of reporting techniques, from FOIA appeals to on-the-ground reporting, to get at the heart of how problems with wetlands and waterways in the United States are tied to climate change concerns. Inside Story spoke with Hannah Northey and Kevin Bogardus of E&E News about their award-winning beat reporting.