How much oxygen does one rainforest provide for the world?

Answer:
All the Rainforests in the world combined accounts for it making 28% of the World's oxygen, and not only that, Rainforests are the World's biggest Pharmacy - with most of its plants being natural medicine.
First answer by ID1388771917. Last edit by Smasha123. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 3 [recommend question].