Question

Level of atmospheric $C{O}_2$ has increased in $2000$ from

• A. $280$ ppm to $360$ ppm
• B. $250$ ppm to $300$ ppm
• C. $300$ ppm to $340$ ppm
• D. $330$ ppm to $350$ ppm

Answer 1

Answer: (A)

$280$ ppm to $360$ ppm

Carbon dioxide is the greenhouse gas. It means that it traps the insolation from the sun and does not allow them to be reflected back. The trapped insolation work in warming the overall temperature of the earth. The level of atmospheric CO${}_2$ was around 200 ppm during the ice age. It rose to 280 ppm during the warmer interglacial periods. Presently, in the Anthropocene era, due to the excessive CO${}_2$ releasing activities like fossil fuel burning, the level of CO${}_2$ has risen to 360 ppm.

Hence, the correct answer is '280 ppm to 360 ppm'