Stirling engine technology promises to turn waste heat from industrial facilities into usable electricity

Nanotechnology start ups claims molecular assembly techniques could produce more efficient ultracapacitors for use in hybrids and energy storage systems

Appeals board withholds permit for new coal-fired power plant in Utah, raising prospect of future curbs on new coal plants under Clean Air Act

Hawaii's low-carbon dream rolls forward with installation of new wave generator

Solar PV manufacturer claims new chemistry makes $1 per watt solar modules possible within two years

Expanding US business helps neighbourhoods club together to improve solar panel purchasing power

Insurers ignoring risk posed by increased frequency of killer heat waves

Company behind shed-sized nuclear reactors chasing $20m in funding to take technology to remote communities and military bases

Scientific advisors warn that official US estimates for future energy demand are failing to account for expected increase in demand from electric vehicles

BusinessGreen.com asks the great and the good of the US cleantech sector what they are hoping to see from the Obama White House