Most of the carbon dioxide that was once part of earth's atmosphere can now be found in

i believe the answer is a or 1

no moderator inbox me? ?

the answer would be..

b. sucking

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.