Where does a plant get the carbon dioxide that it needs for the dark reaction of photosynthesis? Biology Energy In Organisms Photosynthesis 1 Answer Jess the bee · Stefan V. Jun 4, 2018 The air. Literally. Explanation: #"CO"_2# diffuses through the stomata (pores) into the leaf then into the chloroplast where it's used for photosynthesis. Answer link Related questions Why does photosynthesis need light? Why is photosynthesis referred to as a biochemical pathway? Why is photosynthesis important for plants? How does photosynthesis store energy? How do photosystems 1 and 2 differ? How does color affect light absorption? How are pigments related to photosystems? How do chloroplasts and mitochondria work together? What are chloroplasts? What is the visible spectrum? See all questions in Photosynthesis Impact of this question 6218 views around the world You can reuse this answer Creative Commons License