关键词: 生物基材料；碳足迹；汽车应用；固碳抵消

Abstract: With the advancement of global "dual carbon" targets and the strategic deployment of green and low-carbon development in China's "15th Five-Year Plan" (2026–2030), the automotive industry is accelerating its transition toward green and low-carbon transformation. Bio-based materials, due to their renewability, low carbon emissions, biodegradability, and reduced dependence on petroleum-based resources, have become a crucial material choice for sustainable, low-carbon development in the automotive sector. However, systematic and standardized methods for quantifying their life cycle environmental impacts–especially carbon footprint-remain lacking. Based on the content of the invention patent for carbon footprint accounting methods of bio-based materials in Great Wall Motor, this paper systematically investigates the technical framework,implementation pathways, and application value of a "cradle-to-gate" carbon footprint accounting method for automotive bio-based materials. The study indicates that this method constructs a comprehensive carbon footprint assessment model covering the entire process from cultivation to production and factory output, by integrating crop plant information, on-site data collection, multi-stage carbon emission factor calculation, and carbon sequestration offset mechanisms. The model is further enabled by electronic devices and computer programs for automated accounting. This research holds significant application value in automotive material selection, carbon emission management, and green certification, providing technical support for achieving the strategic goal of "accelerating the comprehensive green transformation of economic and social development" as outlined in the "15th Five-Year Plan".

Key words: bio-based materials; carbon footprint; automotive applications; carbon sequestration offset