The impact of depth of environmental provisions and CO2 emissions embodied in international trade.

The construction of trade power and green low-carbon transformation are common high-quality development goals for countries worldwide. The depth of the environmental provisions contained in different countries' intercountry trade agreements and the implicit carbon data of intercountry trade are accurately measured based on the textual analysis of trade agreement rules, and it is empirically found that enhancing the depth of the environmental provisions contained in trade agreements can significantly reduce CO2 emissions embodied in international trade. The capacity of intercountry green technology cooperation to strengthen the internal environmental governance capacity of countries and to enhance carbon productivity is an important transmission mechanism. The effect of the environmental provisions in different types of trade agreements on reducing trade-implied carbon is obviously heterogeneous; the higher the level of correlation with carbon emissions is, the stronger the effect of trade agreement provisions, and that effect is more significant in developed countries and in the reduction of foreign carbon emissions that are embedded in export products. In this paper, the impact of the depth of the environmental provisions of trade agreements on trade-implied carbon under the same framework is directly studied, which not only advances the measurement of the depth of the environmental provisions of trade agreements and expands the research field on the scope of influence of existing trade agreements but also fully accounts for the role of the effectiveness of environmental provisions in different contexts and provides a theoretical basis for the optimization of future environmental provisions.