USA

Source close to Thomas Steyer tells media he could run for Barbara Boxer's seat in 2016 or California Governor in 2018

Nebraskan court gives green light to Keystone XL pipeline route through state increasing pressure on President Obama to approve controversial project

Winners of the agency's Green Power Partnership are using long-term contracts and engaging customers

Clean and Cool reveals 16 companies to take part in latest mission to San Fransisco

Utilities say Cape Wind failed to achieve agreed milestones, as developer downplays news

'If this bill passes this Congress, the president wouldn’t sign it'

Jerry Brown uses inaugural address to reiterate commitment to bold green policies

Industry welcomes moves to soften steep levies imposed to protect US from dumping of low-cost panels

Former Treasury Secretary argues that collapse in oil price offers perfect opportunity for the introduction of carbon taxation

Bloomberg New Energy Finance publishes new report exploring how growing demand for clean energy is playing role in falling oil price