a plant absorbs carbon dioxide from the air to perform photosynthesis
photosynthesis is not chemical_process. photosynthesis is process. photosynthesis is not process. photosynthesis_in_cam_plants is not photosynthesis_in_plants. photosynthesis is chemical_process. photosynthesis is photo_chemical_process. general_photosynthesis is production. photosynthesis_in_plants is not physiological_process. photosynthesis_in_plants is physiological_process. photosynthesis_in_cam_plants is photosynthesis_in_plants.