BBC: The revelations of the NSA whistleblower, Edward Snowden, are an ongoing embarrassment for the US government. From Angry Birds to the mobile phone of Angela Merkel to the banal conversations of millions of people, the scale of the National Secutiry Agency's spying activities knew few boundaries. But can the world's inability to fix the problem of global warming also be laid at the spooks' door? Wind your mind back to December 2009, when world leaders converged on Copenhagen to cook up a global...