Apple CEO Tim Cook made news at February’s shareholders meeting when he shot down a proposal from a representative from the National Center for Public Policy Research that would have required the company to disclose its expenses for its environmental efforts. Cook notably quipped back that “If you want me to do things only for ROI reasons, you should get out of this stock.”

Though Apple’s new Mac Pro isn’t exactly readily availably months after its debut, the new machine showcases Apple’s focus on energy consumption as the upgraded model consumes 68% less power in idle mode than its predecessor, according to Apple.

Finally, Greenpeace, the same organization that conducted the study released today, praised Apple for hiring former EPA administrator Lisa Jackson to lead its environmental efforts.

You can view Greenpeace’s full report here and Apple’s renewable energy microsite here.