Question -
Current concentration of CO2 in atmosphere is:
Options:
A .  270 ppmv
B .  350 ppmv
C .  430 ppmv
D .  500 ppmv
Answer: Option C : C 430 ppmv is thecurrent concentration of CO2in atmosphere.The global concentration of carbon dioxide in the atmosphere – the primary driver of recent climate change – has reached over 400 parts per million (ppm) for the first timethis year.The safe level of carbon dioxide in the atmosphere is 350 parts per million.
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