His math is x ~ 0, hence x / 10 = 0, hence x = NaN.

The starting point is just wrong that Denmark can't play a role when it comes to climate change. Denmark can make a change. It is like saying that when voting that no individual vote or county matters, when the opposite is true: every vote matters in the same way.

Every kg CO2 saved is good... (obviously we should strive for the most economic way to save CO2).