Life Cycle Analysis (LCA) plays a pivotal role in understanding the environmental implications of e-fuels by evaluating their entire lifecycle, from raw material extraction to endof-life disposal. This section systematically reviews the LCA studies focused on e-fuels, providing insights into their greenhouse gas emissions, energy consumption, and overall sustainability. By examining various production pathways, including electrolysis, direct air capture (DAC), and Fischer-Tropsch synthesis, this review highlights the potential environmental benefits and challenges associated with e-fuels, thereby informing future research and policy decisions aimed at reducing the carbon footprint of the energy sector.