Question

Why do plants RELEASE carbon dioxide at night?

Answer 1

During the daytime, plants need carbon dioxide to produce carbohydrates as well as oxygen. Plants , at night, perform the process of respiration in which they take in the oxygen and release carbon dioxide. The process of Photosynthesis which changes CO₂ into O₂ cannot happen at night in the absence of sunlight. So, Plants take in oxygen for respiration and thus release carbon dioxide in the process.