[smokingfrog]

They're using ice cores to determine past levels of CO2, but I have no idea how they can make an accurate measurement of world-wide CO2 levels at the present time.

I don't see how it would be possible to shoot straight up like that..

[jsanders2001]

Major volcanic eruptions? I would imagine they pollute the atmosphere a lot worse than Man does.

[jsanders2001]

Major volcanic eruptions? I would imagine they pollute the atmosphere a lot worse than Man does.

[haroldeveryman]

“I don’t see how it would be possible to shoot straight up like that..”

You mean that enormous spike a the end of the red graph? Somebody farted.