Here is a simplification on the physics behind their invention:

It works by passively drawing in warm ambient air through the funnel, which is fed into a pipe that’s been buried underground. This already starts to cool down the air before it’s fed into coiled cooper pipe that’s been immersed in water in the evaporation chamber. The evaporation process is helped along by a small, solar-powered fan.

The water evaporating around pipe chills the air inside, and this is then fed back underground before entering the refrigeration chamber.

Do you think this will catch on now or possibly in future iterations?  This is the type of outside the box thinking that will improve the quality of life for so many.

Check back for updates and further versions of this awesome device!

thanks to sciencealert.com for the great info

thanks to university of calgary for the pic