The term "future material" is referred for activated carbons (AC) due to their easy/scalable preparation, compatible property, and numerous applications. The applications of such materials for gas adsorption and storage play a vital role in the large-scale feasibility of adsorbed gas storage. This could provide a better alternative to compression-based storage for vehicular applications due to lower energy and materials input. Currently, compression-based storage has been thoroughly studied and widely used; however, there are limited reports on LCA. In this paper, a lifecycle-based approach has been deployed for chemically activated carbon (CAC) production using KOH and compared with inventory-based physically activated carbon (PAC). The PACs have a far lesser impact than the CACs mainly owing to the chemicals used. Potassium hydroxide and electricity account for nearly 70 to 90% of different ecotoxicity indicators. It has also been estimated that if by-products generated using chemicals are recovered, the mid-