A technology that separates air into nitrogen, oxygen, and carbon dioxide with low energy. Rating: 4.2.

The fact that it does not require external power for cooling is revolutionary. It is sustainable in that it does not require large-scale cooling equipment and can ensure low-temperature environments through natural phenomena.

Disaster medical care, agriculture, food preservation, and infrastructure in developing countries have a wide range of demand. The device configuration can also be simplified, allowing for mass production.