Well, look into the article:
"UK was responsible for only about 2% of the world's emissions while the US, with just 4% of the world's population, produced more than 20%. "
In rough terms, if every earthling was the equal of the American, CO2 emission would go to....500% of what it is now. That also would mean that the oil drained 500% faster.
But, us earthlings won't stop anyway, so what's the fuss....
BTW, a theoretical question Lazs2:
If the gasoline would cost you 1.7$ pro LITER, would you think people would consider saving it a tad?