[scott_karana]

That's just CO2. What about sulphur oxides, particulate matter, and the like?

"Pollution" is a general term.

[myztic]

Better late than never: it's hard to get reliable data on such things, CO2 estimates are probably at least somewhat correct.

The larger point being that you have to take into account how many people live in a country, you can't just compare countries without that.