GHG Management

What % of CO2 emitted since 1850 still remains in the atmosphere?

1%
10%
50%
75%

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Correct Answer
50%

And here's something for you to take back

This points to the key challenge in GHG abatement - even if we stop emitting all CO2 today, the amount of CO2 already in the atmosphere can cause enough trouble because it will hang around there for a long, long time.

This is one of the reasons that direct air capture of CO2 is gaining acceptance - because it is not enough to emit less, it is important to suck out stuff that had already been emitted.

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