I found this article raising the challenges facing carbon labeling interesting. Basically the point being, calculating the carbon emissions associated with the manufacturing and transportation of product sounds like a really great way for users to make informed decisions about the products they choose. But given the huge and extremely complex (and expensive) task of standardising the way these kind of calculations are made, it seems unlikely that it will catch on.
Of course, the challenge we face with reducing our own footprint is that it is such an abstract concept to grasp. When you are a regular smoker for example, it's not long before you start wheezing and coughing and feeling like they might actually be some truth in the messages that tell you cigarettes are killing you. Maybe the promise of extreme weather, political and financial instability may have not been enough to get people to alter their lifestyles. But now we're actually seeing some of these things happening around us, maybe we'll start to see some change in the way people consume?