California

Green refurb of 110 Embarcodero will see 7,800 pairs of jeans used as insulation within its walls

Seoul-based company delivers first hydrogen-powered Tucson SUV to customer in California

New York and California among eight states working in partnership to accelerate deployment of zero-emission vehicles

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