The Credit Card that tracks your carbon footprint

This is GENIOUSE - and we are thrilled to see how far this will take us. Will it be possible to actually see these numbers when we are about to make a purchase in the future? In order to always have the possibility to make a consciouse choise before we decide where and what we want to buy? 
It would most certeanly make the environmental impact of our choises much more real to us.