This article on marine algae has a couple of fascinating ideas: oxygen comes from slime; kelp is not a single plant but a group individuals; there are 7,000 species of algae, and they produce 330 billion tons of oxygen per year.
This article on marine algae has a couple of fascinating ideas: oxygen comes from slime; kelp is not a single plant but a group individuals; there are 7,000 species of algae, and they produce 330 billion tons of oxygen per year.