According to the United Nations (UN), water shortages affect more than 40% of the world's population and are expected to increase. Most importantly, three out of ten people do not have access to safely managed drinking water services. Chemistry can bring a solution to this problem identified as SDG 6, "change our world" using porous materials, especially metal organic frameworks (MOFs). Porous materials like MOF have sponge-like chemical structures with microscopic spaces that can selectively capture molecules, from gases-hydrogen, methane, carbon dioxide, water-to more complex substances such as drugs and enzymes. Although some researchers have focused on the application of MOFs in drug delivery and gas purification, Omar Yaghi stumbled upon their huge potential to capture water from the atmosphere. "When we studied the absorption of post-combustion gas into the MOF, we noticed that some MOFs had unique interactions with water molecules," Yaghi explained. They then wondered if there were the same materials "that could" be used to capture moisture from the atmosphere in arid climates and then easily be released for collection. "This technology is unique because it can obtain a potable amount of pure water from the dry desert air and does not require energy other than natural sunlight," Yaghi said. Just one kilogram of MOF can harvest 2.8 liters of water per day with humidity as low as 20%. In developing higher-capacity, possibly cheaper water-collecting materials, Yaghi "has already worked with companies to test their MOF water harvesters on an industrial scale." There are other porous materials with similar capabilities, such as silicon-based and inorganic Porous solids, and recently reported bionic porous surfaces that mimic cactus thorn structures require only one kilogram of MOF to harvest 2.8 liters of water per day with humidity as low as 20%. In developing higher-capacity, possibly cheaper water-collecting materials, Yaghi "has already worked with companies to test their MOF water harvesters on an industrial scale." There are other porous materials with similar capabilities, such as silicon-based and inorganic Porous solids, and the recently reported bionic porous surface that mimics the structure of a cactus thorn [only one kilogram of MOF can harvest 2.8 liters of water per day with humidity as low as 20%. In developing higher-capacity, possibly cheaper water-collecting materials, Yaghi "has already worked with companies to test their MOF water harvesters on an industrial scale." There are other porous materials with similar capabilities, such as silicon-based and inorganic Porous solids, and recently reported bionic porous surfaces that mimic cactus spines. Yaghi believes that most of them are less capable of absorbing water from low-humidity air than MOF. However, further research can certainly explore all the possibilities of finding the best solution, not only for harvesting water, but also for purifying it, ensuring that one of the most important goals of the United Nations is achieved-achieving adequate and equitable sanitation and hygiene.