Fears mount that smart meter firms could become embroiled in lawsuit against PG&E alleging its smart meter rollout has driven up energy bills

XCel Energy signs up to Microsoft's online energy usage service

Battery firm posts quarterly losses as it continues to expand capacity

As GM announces plans for a second plug-in hybrid, Chrysler controversially reneges on commitment to launch electric vehicles

Chinese researchers say new carbon nanotubes will make oil spill clean-ups quicker and easier

Fund will invest directly into medium-sized biomass plants

Recent legislative moves on both sides of the Atlantic could help company's fortunes

Report argues that improved "recruitment, retention of employees, less sick time and greater productivity" mean investment in green offices makes sense

New species planted on factory roof to help cool building and combat air pollution

Many hot rock research projects to receive "unprecedented" level of federal funding