USA

Leading solar installer secures two new tranches of investment in a move that could deliver a boost to the commercial solar market

Eight corporate giants speak out forcefully about the business benefits of the federal plan to mitigate carbon emissions, using friend-of-the-court briefs to jump into the controversy

Two countries promise to take "domestic steps" to confirm participation in the climate pact as early as possible this year

Its venture capital arm can earn returns more quickly than through traditional equity investments

Firm teams up with geothermal specialists Ormat to build 10MW energy storage project in Georgetown, Texas

Coalition of state attorney-generals announce they will work together to investigate corporate 'climate fraud', as Massachusetts adds its weight to joint investigation into Exxon Mobil's climate-related disclosures

Leading US solar energy company may be forced to seek bankruptcy protection as it struggles with $11bn debt mountain and government investigation into its cash disclosures

Fledgling US start-up secures right-of-way lease to develop 50MW gravity-based energy storage project

Barack Obama's climate diplomacy drive continues with new partnership to scale up renewables, tackle aviation emissions, and phase out potent warming gases

Transforming carbon emissions from fossil fuel generation is more than a business opportunity