My argument wasn't that it's impossible to fully support a human with oxygen from houseplants. The point is that the oxygen output of a single houseplant, or ev

My argument wasn't that it's impossible to fully support a human with oxygen from houseplants. The point is that the oxygen output of a single houseplant, or even a dozen of them, is negligible relative to the oxygen consumption of even a single human. That doesn't mean that there aren't good reasons to own a houseplant, it just means that oxygen production isn't one of them.