What gas do plants release as a byproduct of photosynthesis?

During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen, using sunlight as an energy source. The process occurs in the chloroplasts and involves the green pigment chlorophyll. As plants take in carbon dioxide, they release oxygen as a byproduct, which is essential for aerobic respiration in animals and many other organisms. This release of oxygen not only contributes to the atmosphere but also plays a crucial role in sustaining life on Earth. The understanding of this process is fundamental in biology and ecology, as it illustrates the interdependence of plant and animal life.