As part of a report (PDF) rating several high-tech companies, Greenpeace has made public a critical stance of Apple's cloud-based environmental impact. The "clean energy index" rating for Apple's data services is just 6.7 percent, versus the likes of 21 percent for Twitter, 36.4 percent for Google and 55.9 percent for Yahoo. Apple was also given a "coal intensity" rating of 54.5 percent, in theory making it the most intense polluter amongst the group because of relatively high power consumption versus its coal power dependence.
