USA

Tech and retail giants lead the way as official rankings reveal those US companies stepping up their interest in green power

Member of European parliament wants US president to live up to climate change rhetoric by helping to advance carbon dea

Obama's climate change agenda secures major boost as four-month Senate stand-off over EPA appointment comes to an end

Construction giant attacks business group's support of initiative it fears would ban the future use of the green standard by public buildings

Countries agree to tackle coal-fired power stations and heavy-duty vehicles under new bi-lateral accord

United States joins Germany, China and Italy as only countries to exceed 10GW of photovoltaic capacity

Solar Impulse touches down in New York completing final leg of journey from Washington DC

PwC's Malcolm Preston asks if western governments are pursuing the right sort of growth

NRG Energy announces plans to build 6.2MW solar system on the roof of the Mandalay Bay Resort Convention Centre

Reports suggest EPA has already submitted first set of draft power plant emission regulations