To elaborate, Norway population is ~5M, which is ~0.05% of the the world population. Even if they were the worst polluters ever, at 20x average (they are not!)

To elaborate, Norway population is ~5M, which is ~0.05% of the the world population. Even if they were the worst polluters ever, at 20x average (they are not!) and even if they went back to living in caves and became vegetarian tomorrow -- the effect size would be 1% of the total world action. And Oslo is just 12% of Norwegian population, so ...