Apple has been named the least green of tech companies in a controversial new Greenpeace evaluation, due to its use of energy from coal-fueled power stations. The league table - which ranks Yahoo! as the greenest company, followed by Google and Amazon - is part of Greenpeace's "How Dirty is Your Data?" report that will be released today. It suggests that Apple's new North Carolina data center - expected to be the epicenter of new MobileMe and cloud-based services - will triple the company's electricity consumption.