Environmentalhard · Past Paper
What is the approximate CO2 concentration in the atmosphere today (rounded)?
A280 ppm
B350 ppm
C420 ppm
D550 ppm
✓ Correct Answer: C — 420 ppm
Atmospheric CO2 levels have risen from pre-industrial levels of 280 ppm to over 415-420 ppm in recent years.
Share this question
More from Environmental
- Which layer of the atmosphere contains the 'Good Ozone' that protects us from UV rays?
- Which type of clouds are often associated with 'Polar Stratospheric Clouds' (PSCs) that aid ozone depletion?
- What does 'COD' stand for in the context of water pollution?
- The Basel Convention is an international treaty that deals with:
- Which soil conservation method involves building steps on hillsides?