Which of the following is a source of naturally occurring carbon dioxide in the atmosphere?
A)cellular respiration by living organisms
B)the combustion of plant material ignited by lightning
C)volcanic eruptions
D)all of the above

Question

Quizplus · Accepted Answer

All three options are sources of naturally occurring carbon dioxide in the atmosphere. Cellular respiration by living organisms releases CO2 as a byproduct, combustion of plant material ignited by lightning also releases CO2, and volcanoes release CO2 (among other gases) during eruptions.

Which of the Following Is a Source of Naturally Occurring