Humans exhale carbon dioxide (CO2) as a byproduct of respiration. During the process of cellular respiration, cells utilize oxygen to convert glucose into energy, producing carbon dioxide and water as waste products. This process is essential for producing ATP, the energy currency of cells. Exhaled CO2 is then transported to the lungs, where it is expelled from the body when we breathe out. While carbon dioxide is a normal component of the air we breathe, excessive levels in the environment can contribute to climate change, leading to increased attention on the importance of reducing greenhouse gas emissions for environmental health.