Nanoporous atomically thin membranes (NATM) have emerged as a promising platform for effectively separating molecules and ions, exploiting mass, size, and affinity differences. Despite significant progress on the fundamental aspects of NATM including transport mechanism, pore incorporation, and membrane fabrication, this field faces an outstanding critical challenge on the scalability of NATM membranes. The most popular and studied NATM is PG. Successful incorporation of carbon dioxide (CO2)-selective pores in PG has led to attractive performance for carbon capture. This involves selective separation of CO2 from nitrogen (N2). It is crucial to develop high-performance carbon capture membranes that reduce the consumption and the associated cost of carbon capture from point-emission sources. Indeed, technoeconomics assessments of the capture process based on high-performance PG membranes indicate that the energy efficiency of capture can be significantly improved compared to the commercial aminebased absorption process. This is mainly because the membrane processes do not require thermal energy but rather rely on electrical energy. This is also because PG membranes yield extremely high CO2 permeance thanks to its atom-thin selective layer. This minimizes the required membrane area and the capture process footprint, making capture based on PG membranes advantageous compared to the state-of-the-art membranes based on polymers, zeolites, metal-organic frameworks, covalent-organic frameworks, and carbon molecular sieves. A low-footprint capture process is attractive to application in the transportation sector, especially the international shipping industry, responsible for 2-3% of global CO2 emissions.