Russia is no friend. They never were and never will be. You think selling arms and last minute dealings in Iraq before we went in was friendly? You think helping Iran build nuclear reactors is friendly? Do you think selling 55 MiGs to Venezuela (Chavez, openly communist, openly anti-US) is friendly?
With friends like Russia, who needs enemies? I could go on about Russia, but it may fill up a book. Just remember this...once a commie, always a commie.
What I think they're doing is getting ready to rip off the EU bigtime by selling their carbon credits, and then backing out of their promise to ratify the treaty.