Everyone will have to ratchet down their standard of living by over 75%...
Throughout the developed world, per capita carbon output ranges from 4.46 (France) to Canada being the highest at 15.43.
The article talks about the personal challenges around living an ultra-low carbon lifestyle. According to the piece, 2 tonnes/year is also about half the output of a single gas powered car in the US, so the first step for any Americans (or Canadians) wanting to do this, they would have to start by ditching their cars.