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We breathe plant farts
(feddit.uk)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Plants do indeed use O2. They use if for the same reason we do, the have mitochondria that use O2 during respiration.
During the day plants typically produce more O2 than they consume, but at night they need it from elsewhere.
I guess, yea, they're making sugar, but they're still going to need to metabolize it. Why do I have the impression I probably knew this at one point in time...?