Carbon footprint, if it matters at all, is a second or third-tier concern. You can’t control your carbon footprint, and the further your analysis goes away from your direct behaviors and technology adoptions, the less you can measure, control, or even affect it. Efforts to do so will be the next level of impact you can have after your direct emissions are handled. Your personal responsibility can be seen best through your personal decisions about your own direct emissions. Handle those first, and you will have gone a very long way to contributing to a real solution.