31 Results for



Costa Rica hits 75 days powered entirely by renewable energy

Heavy rainfall has allowed the Central American country of Costa Rica to be powered almost entirely by its hydroelectric plants.

By March 24, 2015


Greenpeace: Time for cloud companies to come clean

Data centers from cloud companies, such as Apple and Google, are getting cleaner but Greenpeace pushes for more transparency on energy use and sources.

By April 17, 2012


Hybrids can be less polluting than coal-powered EVs

How green is an EV? A Union of Concerned Scientists report compares global warming emissions of plug-in vehicles to gasoline-powered cars.

By April 16, 2012


IBM developing EV app to let drivers select renewable energy

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.

By October 13, 2011


U.N.: Renewables could be 80 percent of energy by 2050

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.

By May 9, 2011


Harness some hydropower to clean your grill

Grill brush uses steam heat to remove grime from your grill.

By April 14, 2009


On the hunt for green-tech game changers

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.

By April 22, 2011


Greenpeace dings cloud providers on dirty energy

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.

By April 21, 2011


Battery uses freshwater, salt water to produce power

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.

By April 1, 2011


GE opens wallet for wind, solar, industrial efficiency

GE Energy agrees to spend $3.2 billion for Converteam, giving GE efficient industrial motors and power controls for "mega trend" toward electrification.

By March 29, 2011