The global automotive industry continues to thrive, delivering significant mobility benefits while generating substantial carbon emissions. Research indicates highlights the critical need to accelerate decarbonization across upstream supply-chain segments, esp. steel and aluminum. However, limited demand from automakers has constrained large-scale adoption of low-carbon raw materials. Overcoming this bottleneck requires heightened awareness and coordinated support from all stakeholders. In view of this, in 2025, the Institute of Public and Environmental Affairs (IPE) and Green Jiangnan, together with nine other environmental organizations, jointly launched the “Auto Carbon Scan” campaign. With the support of several foundations, IPE has also conducted study on the 'Automobile-Steel and Aluminum Green Supply Chain Collaborative Carbon Reduction'. The study focuses on motivating the automotive industry to publicly disclose supply chain carbon reduction targets, implement low-carbon procurement requirements, and incentivize hard-to-abate industries such as steel and aluminum smelting to accelerate the production and supply of low-carbon products.