This gas law explains how high ambient altitude reduces the availability of oxygen.

Dalton's Law is the concept that explains how high ambient altitude reduces the availability of oxygen due to its relationship with partial pressures of gases in a mixture. At higher altitudes, the overall atmospheric pressure decreases, which in turn lowers the partial pressure of oxygen, even though the percentage of oxygen remains the same (approximately 21% of the atmosphere). This reduction in partial pressure means that there is less oxygen available for the body to absorb, which can lead to hypoxia or a deficiency of oxygen in the body.

Understanding this principle is vital, especially for pilots and others who operate at high altitudes, as it underlines the physiological challenges faced in such environments. While other gas laws might discuss aspects of gas behavior under different conditions, they do not specifically address the impact of ambient pressure on the availability of oxygen like Dalton's Law does.