Measured against the legally binding international climate targets, climate policy must be massively accelerated on a worldwide scale. In the absence of effective global policy instruments, a central role can be played by combinations of regional quantity governance systems, such as the EU Emissions Trading System, and additional border adjustments, such as the newly established EU Carbon Border Adjustments (CBAM). This is to avoid mere emissions shifting to other states, to encourage these states also to pursue ambitious climate protection, and to avoid competitive disadvantages for domestic industries. This paper analyzes the ecological effectiveness of the CBAM—measured against the Paris climate targets—and its compatibility with world trade law. It combines a qualitative governance analysis with methods of legal interpretation. It is demonstrated that the CBAM does not raise any concerns under WTO law and can be classified as an ecologically effective measure supporting ambitious climate protection. However, the faster and more consistent introduction of the CBAM would be ecologically more effective.
Ecological conservation and governance play key roles in constructing an ecological civilization society, while intergovernmental cooperation provides new perspectives for cross-regional ecological governance. We employed a social network analysis (SNA) method to examine 110 published ecological policies from 2000 to 2024 in the Source Region of the Yangtze River (SRYR). The study has three key findings. Firstly, intergovernmental collaborative policies on ecological protection showed an upward trend, with intra-provincial collaborations within Qinghai Province being the most frequent. Secondly, four collaboration models were demonstrated, namely: national ministries, national and provincial, cross-provincial and intra–provincial collaborations. National agencies and Qinghai provincial agencies collaboratively set objectives, which Qinghai operationalizes with incentive-constraint measures. Then, the targeted guidelines were launched by national and provincial authorities. Afterward, cross–provincial agreements and mechanisms facilitate joint actions. Thirdly, we revealed the hierarchical structures, including a national network, two central-local sub-networks, three-tier inter-provincial partnerships, and four regional sub-clusters. Core actors include national ministries that coordinate cross-departmental efforts. The Qinghai provincial government serves as a central-local hub. It maintains strong transboundary ties with Aba and Ganzi Prefectures of Sichuan Province. Provincial departments such as ecology and environment, forestry and grasslands, and finance lead intra-provincial collaborations. These findings offer new insights for integrating multi-level governance in ecological protection and ecological civilization construction.