Question

At present, the concentration of atmospheric $C{O}_2$ is _________.

• A. $100$ ppm
• B. $240$ ppm
• C. $380$ ppm
• D. $520$ ppm

Answer 1

Answer: (C)

$380$ ppm

CO₂ is a major pollutant of air and a green house gas that contributes to global warming. Concentration of CO₂ in the atmosphere is expressed in terms of parts per million or ppm. According to latest research by forecasting systems, CO₂ concentration was found to be about 380 ppm which in recent years has increased upto 400 ppm.

So, the correct answer is '380 ppm'.