Research on the Design Mechanism of Unified Carbon Emission Trading Market under the “Dual Carbon” Goal —Taking the Chengdu metropolitan area as an example

As the first approved metropolitan area in the central and western regions, the Chengdu metropolitan area undertakes the important task of promoting regional coordinated development and economic transformation. The region is located in the upper reaches of the Yangtze River, with outstanding ecological barrier functions, but faces serious cross regional carbon emissions pollution and environmental governance pressure. Carbon emission trading, as a market control measure, has achieved success in practice both domestically and internationally, providing new ideas for environmental governance in the Chengdu metropolitan area. This study analyzed the framework and key factors of the cross regional carbon emission trading market in the Chengdu metropolitan area, and established a cross regional carbon emission trading market through the establishment of trading regions, management objects, total control, trading platforms, supervision and verification to ensure fair, effective, and sustainable operation of the market. In addition, the paper also designed a quota allocation mechanism and supervision management plan for the carbon emission market, providing decision-making references for future policy implementation and regional collaborative governance.