Environmentalhard · Past Paper
What is the approximate concentration of CO2 in the atmosphere today (in PPM)?
A280 PPM
B415-420 PPM
C100 PPM
D1000 PPM
✓ Correct Answer: B — 415-420 PPM
Atmospheric CO2 levels have risen from pre-industrial levels of 280 PPM to over 415 PPM currently.
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