Oxygen is a vital element essential for life on Earth. It constitutes about 21% of the Earth’s atmosphere. In the process of photosynthesis, plants release oxygen as a byproduct, which is crucial for the survival of aerobic organisms. Humans and animals depend on oxygen for respiration, a metabolic process that generates energy. The oxygen content in the atmosphere is carefully maintained, ensuring the balance necessary to sustain life and ecosystems. Monitoring and preserving oxygen levels are critical for environmental sustainability and the well-being of all living organisms.