Carbon Detective: Is there a right size?

Is there are right size for my carbon footprint? Let us see the current situation for the various countries. If per capita GDP is considered as one indicator of our progress, then there could be multiple paths and corresponding footprints.
Whichever path we take, there is no doubt about the starting point. We are at the bottom left corner of the graph and our per capita footprint is bound to increase. However, even today, for a similar per capita GDP, the per capita Carbon footprint could be very different across the nations. This tells us that though the per capita footprint is bound to increase, the path chosen and the corresponding footprint can be different.
The size of dot tells us that whether we wish it or not, the CO2 emissions from emerging economies like India will be under focus.
So, is there a right size for carbon footprint? There is definitely an appropriate size, a size that is also a function of the overall environment and time. The millenials will have to follow a different path than that followed by the Economies growing in 1900s.The governments are already busy checking the trade-offs required for a low carbon economy. It is a tough balancing act to shift right on the per capita GDP axis without going too high up on the per capita CO2 emission axis.