NICOLE OFF GRID WIKIPEDIA FREE

Traditional routes to bring SMDW on premises to currently unserved populations are estimated to cost US$114 billion per year (from 2015), more than three times the historical financing trend 19.

NICOLE OFF GRID WIKIPEDIA FREE

Progress towards this target is measured by the WHO/UNICEF Joint Monitoring Programme (JMP) as the percentage of population using safely managed drinking water (SMDW), where ‘safely managed’ is defined as “an improved source located on the premises, available when needed and free of fecal and priority chemical contamination” 1, 2. Similar content being viewed by othersĮnsuring reliable access to safe drinking water for all remains a global challenge, and is formally recognized as an international development priority by 2030 in the United Nations framework for global development priorities, the Sustainable Development Goals 6.1 18. Our tools can inform design trade-offs for atmospheric water harvesting devices that maximize global impact, alongside ongoing efforts to meet Sustainable Development Goals (SDGs) with existing technologies. Indeed, these performance targets have been achieved experimentally in demonstrations of sorbent materials 15, 16, 17. We plot the impact potential of existing devices and new sorbent classes, which suggests that these targets could be met with continued technological development, and well within thermodynamic limits. Such a device could meet a target average daily drinking water requirement of 5 litres per day per person 14. Our assessment-using Google Earth Engine 13-introduces a hypothetical 1-metre-square device with a SY profile of 0.2 to 2.5 litres per kilowatt-hour (0.1 to 1.25 litres per kilowatt-hour for a 2-metre-square device) at 30% to 90% RH, respectively. Here we show that AWH could provide SMDW for a billion people.

However, to our knowledge, no analysis has mapped the global potential of AWH 12 despite favourable conditions in tropical regions, where two-thirds of people without SMDW live 2. Solar-driven atmospheric water harvesting (AWH) devices with continuous cycling may accelerate progress by enabling decentralized extraction of water from air 3, 4, 5, 6, but low specific yields (SY) and low daytime relative humidity (RH) have raised questions about their performance (in litres of water output per day) 7, 8, 9, 10, 11.

Access to safely managed drinking water (SMDW) remains a global challenge, and affects 2.2 billion people 1, 2.

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