Geothermal

Geothermal power technologies, projects, potential, risks, and financing. Renewable Top Plant award winners.

Tapping seafloor volcanic vents
Tapping seafloor volcanic vents

The attraction of renewable energy sources is that nature continuously replenishes them. As fuels, they may not be infinitely renewable or completely environmentally benign, but they all have one thing…



Regulators should stop playing the greed card
Regulators should stop playing the greed card

In early February, Western GeoPower (WGP) announced its termination of a 20-year geothermal power purchase agreement (PPA) with Pacific Gas and Electric Co. (PG&E). A WGP press release explains that…


Raft River Geothermal Project, Malta, Idaho
Raft River Geothermal Project, Malta, Idaho

Idaho began tapping its vast geothermal energy supplies as far back as 1892 to supply district heating to its capital city, Boise. A century later Idaho had no operating geothermal…


Global Monitor (July 2007) 
Global Monitor (July 2007) 

Pistachio plant gives new meaning to green Now you can feel really green about those tasty green pistachio snacks. Paramount Farms in California's agriculture-rich Central Valley, billing itself as the…


Turning the corner on global warming
Turning the corner on global warming

In his keynote speech this May to the Global Roundtable on Climate Change, held in Iceland and hosted by the Earth Institute of Columbia University, Ólafur Ragnar Grimsson—the president of…


Renewable contracts merit longer terms
Renewable contracts merit longer terms

The length of term allowed for power sales contracts is a critical determinant of the ability of states to meet their increasingly ambitious renewable power targets. Many utilities advocate limiting…


Big batteries blooming
Big batteries blooming

All interconnected transmission and distribution (T&D) grids have one thing in common: Their operators must continually dispatch generators to keep the network's supply and demand in balance at all times…