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
- The accumulation of toxic chemicals in the food chain at higher trophic levels is known as:
- What is the 'Cl-O-Cl' catalytic cycle primarily associated with?
- Which of the following is a byproduct of incomplete combustion that affects the climate?
- What is the 'Greenhouse Warming Potential' (GWP) of Methane compared to CO2?
- Which pollutant is responsible for the 'yellowing' of the marble of the Taj Mahal?