

Plants only absorb CO² and release oxygen when photosynthesizing, which requires sunlight. At night plants undergo cellular respiration where they absorb oxygen and release CO². Some sealed terrariums haven’t had any water, air, or fertilizer for decades.
https://laidbackgardener.blog/2019/10/14/the-worlds-second-oldest-sealed-terrarium/






It’s more like walking on train tracks and being surprised when you are hit by a train.