Which gas do plants absorb from the atmosphere?

Plants absorb carbon dioxide from the atmosphere as part of the process of photosynthesis. During photosynthesis, plants take in carbon dioxide through tiny openings in their leaves called stomata. This gas combines with water and sunlight to produce glucose (a form of sugar) and oxygen. The glucose is used as energy for the plant’s growth and development, while oxygen is released back into the atmosphere as a byproduct.

Carbon dioxide is essential for plants as it's a key ingredient in forming carbohydrates, which are vital for plant structure and energy. Without carbon dioxide, plants would not be able to perform photosynthesis effectively, leading to their inability to grow and flourish. The other gases mentioned, such as oxygen and nitrogen, play different roles in both the environment and plant biology but are not absorbed in the same way that carbon dioxide is for photosynthesis.