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Heavy rainfall has allowed the Central American country of Costa Rica to be powered almost entirely by its hydroelectric plants.
Data centers from cloud companies, such as Apple and Google, are getting cleaner but Greenpeace pushes for more transparency on energy use and sources.
How green is an EV? A Union of Concerned Scientists report compares global warming emissions of plug-in vehicles to gasoline-powered cars.
The pilot program is connecting EV systems and renewable energy production to the cloud to help drivers recharging their vehicles when clean energy is available.
Solar, wind, and hydropower could supply the bulk of energy demand by the middle of the century but there are substantial political and technical barriers to that change.
Grill brush uses steam heat to remove grime from your grill.
On Earth Day, CNET looks at one of the central questions around green tech: how quickly green innovations can be developed and put in place on a large scale.
The environmental watchdog group ranks the coal intensity of Internet companies, asking them to not just tout efficient data centers but also influence clean-energy policy.
Stanford researchers have come up with a rechargeable battery that takes advantage of the difference in salinity between salt water and freshwater to produce electricity and charge itself.
GE Energy agrees to spend $3.2 billion for Converteam, giving GE efficient industrial motors and power controls for "mega trend" toward electrification.