Since 1958, CO₂ in the atmosphere has A) increased in concentration by 30%. B) decreased in concentration by 30%. C) remained at about the same concentration from year to year. D) disappeared entirely. E) has doubled in concentration.

Question

Quizplus · Accepted Answer

The question mentions the compound CO₂ has been present in the atmosphere since 1958. The only answer option that corresponds to an increase in concentration is A, which states that the concentration has increased by 30%. None of the other options suggest an increase in concentration.

​Since 1958, CO2 in the Atmosphere Has

Since 1958, CO₂ in the Atmosphere Has