USA

Greenhouse Gas Management Institute and Eco-Canada team up to launch ISO-backed professional standard

Dan Akerson argues additional tax on fuel would be more effective than national efficiency standards

But European wind energy sector calls for further action to eliminate discriminatory practices favouring Chinese wind turbine manufacturers over imports

Plans for a $5bn cable to connect wind farms off America's Atlantic coast clear first regulatory hurdle

Innovative online solar technology retailer inks major in-store distribution deal

Northeast, Chicago and California big winners as Florida's Republican governor declines federal rail funding

Experts warn critical energy information could be lost as a result of US budget cuts

Coalition of environmentalists claim government has failed to protect the atmosphere

Bipartisan group moves to repeal $6bn biofuel tax break

We run down our list of the world's top green business tweeters