The life cycle assessment (LCA) examines the environmental impacts of producing low-carbon hydrogen via electrolysis, capturing CO2 through direct air capture (DAC), and synthesizing synthetic natural gas (SNG). The study reveals that SNG can reduce life cycle greenhouse gas (GHG) emissions by 52-88% compared to fossil natural gas, depending on the energy sources used for electrolysis and DAC. Utilizing renewable energy sources such as wind, solar, nuclear, and hydro for producing low-carbon hydrogen and capturing CO2 significantly reduces the overall carbon footprint of SNG, aligning with sustainable energy goals in USA .