Apple, SolarCity, Intel and San Diego International Airport among group of 140 Californian firms to sign new climate declaration
Fiscal 2015 budget to include new climate resilience funding, as California provided with fresh funds to tackle crippling drought
Experiment successfully produces energy from fusion reaction, although self-powering systems remain a long way off
Controversial rail link the main beneficiary as Governor Brown unveils $850m green project budget
New report from Environmental Defense Fund hails "well constructed" emissions trading scheme's successful first year
New Reuters Point Carbon report shows carbon market value sank 38 per cent in 2013, despite strong growth in North America and emerging pilots in China
Four jurisdictions agree to align low carbon policies, potentially paving way for carbon-trading scheme
Mayor Boris Johnson confirms hundreds of e-bikes will be rolled out in Haringey next year, as Tesla opens outlet in Westfield shopping centre
$6bn network designed to cut journey time between San Francisco and Los Angeles to 30 minutes has turned to crowdfunding sites
Google-backed 392MW Ivanpah solar plant in California started to produce power this week