A team of researchers from X–Alphabet's "moonshot factory," Google and the WHO/UNICEF Joint Monitoring Programme, Division of Data, Analytics, Planning and Monitoring, UNICEF, has developed a model that shows that a hypothetical device that uses solar power to pull water from the air could potentially serve a billion people across the world. In their paper published in the journal Nature, the group describes the factors that went into their model and its possible impact on the development of devices meant to meet the global challenge of providing safe drinking water to the people of the world.

In building their model, the researchers acknowledged that solar powered devices capable of pulling water from the air only work well under certain conditions—where humidity levels regularly reach 30%, where there is plenty of sunshine and where it is warm enough.

To account for people living in areas with such conditions, the researchers pulled average weather data from sites across the globe and mapped them with populations facing water challenges. In doing so, they found that more than a billion people could benefit from such a device that could produce on average five liters of drinking water per day.

They conclude by claiming that current technology trends suggest that the hypothetical device they envisioned in their model could soon become reality. At that point, however, it would fall to those who are able to pay for and distribute them to do so.