What plant produces the most oxygen?

Question

Was churious about what plant produces the most oxygen. (was wondering if test have already been done)

Answer 1

I don't believe there is one plant that makes the most oxygen by itself but some plants such as rubber trees, and ivy produce a lot of oxygen, are good at cleaning air and make great houseplants.

Overall blue-green algae produces most of the Earth's oxygen (around 70% to 80%)