During photosynthesis, trees primarily release oxygen as a byproduct. This process occurs in the chloroplasts of plant cells, where carbon dioxide and water are converted into glucose and oxygen using sunlight energy. The oxygen released is a crucial element for life on Earth, as it is used by most living organisms for respiration. Conversely, carbon dioxide, which trees absorb, helps mitigate climate change by reducing greenhouse gases in the atmosphere. This remarkable process highlights the vital role trees play in maintaining ecological balance and supporting life.