Scientists at Tokyo Tech and Tokyo University of Science have developed a new porous crystalline solid, named 1a, that demonstrates high efficiency in capturing and releasing ammonia (NH3) through a simple pressurization and decompression process at room temperature. This material addresses the challenge of storing and transporting hydrogen gas safely by providing a stable and cost-effective solution for ammonia storage, which can serve as an energy carrier for future hydrogen economies. Compared to hydrogen, ammonia does not require extreme conditions for storage, allowing for energy savings and potential repurposing of existing infrastructure. The compound 1a (N) is chemically stable and facilitates energy-efficient adsorption and release of NH3 due to its unique CO2H functional groups. The material's ability to pack NH3 at a high density, almost comparable to liquid NH3, along with its easy preparation process, makes it a promising candidate for practical applications. The innovative properties of 1a (N) make it a viable option for sustainable NH3 storage, potentially leading to advancements in hydrogen economies. By further modifying the compound, it may also have the capability to adsorb other reactive gases, expanding its utility in diverse industrial applications.