How do plants affect carbon dioxide levels?
A-They keep the levels of carbon dioxide the same.
B-They absorb carbon dioxide from the air.
C-They put more carbon dioxide into the air.
D-Their seeds are made of carbon dioxide.
A-They keep the levels of carbon dioxide the same.
B-They absorb carbon dioxide from the air.
C-They put more carbon dioxide into the air.
D-Their seeds are made of carbon dioxide.