I have been somewhat crazy radical in the past, not so much any more. What I've always objected to in this calculator is that it starts out by asking where you live, and then you become responsible for a certain amount of footprint you have absolutely no control over. So if you live in Burkina Faso and behave like a radical lunatic you can get by with one earth, but if you live in Cleveland, according to this calculator, you're physically incapable of it. Try the calculator you brought up - apparently nothing you do short of dying will accomplish one-earth living if you choose this particular corner of earth. To me, whether I'm using up two earths or seven makes no difference, so I'm never motivated by this quiz.