answersLogoWhite

0


Best Answer

The Amazon rainforest, along with the central African region rainforest (in addition to heavily forested areas in other parts of the world). After all, plants take in CO2 and give off oxygen.

User Avatar

Wiki User

13y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

14y ago

Ocean Based Phytoplankton

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the primary source of the earth's oxygen?
Write your answer...
Submit
Still have questions?
magnify glass
imp