I calculated my carbon footprint with Carbon Footprint, and came out with 6.1 mt CO2/yr (mt=metric ton=1000 kg). I'm happy with this. I don't see how I can possibly get it much lower, unless I were not to fly at all (at present I only fly about once a year), which would save me about 1 mt/yr.
average American = 20.4 mt/yr
average for industrial nations = 11 mt/yr
worldwide average = 4 mt/yr
to combat climate change, the worldwide average needs to be 2 mt/yr
Let's repeat just one more time: we are not going to solve global warming by living like primitive people. It requires changes in technology.