As we know that, Africa is a hot country. Plant hard to grow in hot environment with sacred water supply. However, recently a water vapor machine was designed by Sangwook Park, Sinjeong Lee, Hoyoung Lee and Hyeongju Jo. This machine is able to produce water vapor from the combination of cold air and hot air. When there is sufficient water vapor, the agriculture is able to grow on the land and using water vapor as water supply.
This machine works by combining both hot air and cold air to produce water vapor. As there are water droplet in cold air, but the water vapor formation need a constant temperature. Hence, when hot air is mixed with cold air, water vapor will be formed and it is released out of the machine and moisturize the surrounding environment. This enable crops to grow on the land.