How Green Credit Reshapes Environmental Performance of High-Polluting Enterprises: Empirical Evidence from China and Global Implications

Introduction

The advancement of global climate governance and the Sustainable Development Goals (SDGs) has elevated green finance from a fringe topic to the core of the international policy agenda. Over the past two decades, governments and financial institutions around the world have introduced green credit policies, attempting to curb investment in highly polluting industries and steer capital toward low-carbon technologies and clean energy projects. However, have these policies truly improved corporate environmental performance? And what are their mechanisms of action?

As the world's largest carbon emitter and manufacturing base, China's green credit practices provide a unique natural experiment for the globe. In 2012, the China Banking Regulatory Commission (now the National Financial Regulatory Administration) issued the *Green Credit Guidelines*, requiring banks to incorporate factors such as energy conservation, emission reduction, and environmental protection as primary criteria in credit decisions. This policy is regarded as one of the most systematic green financial interventions in developing countries.

A recent study published in *Humanities and Social Sciences Communications* rigorously evaluated the environmental effects of green credit using a difference-in-differences (DID) approach, based on panel data of Chinese A-share listed companies from 2006 to 2022. The study utilized the Bloomberg ESG environmental score—an indicator that comprehensively measures resource efficiency, pollution reduction, and ecological protection—as a proxy for corporate environmental performance, providing quantitative evidence for understanding the effectiveness of green credit.

Key Findings: Significant and Measurable Environmental Improvements

The study found that the implementation of the 2012 Green Credit Guidelines led to a 2.3–3.7 point increase in the environmental scores of high-polluting firms. This improvement is far from a minor statistical fluctuation. According to Bloomberg's calibration, this increase corresponds to an annual reduction of approximately 1.2–1.8 million tons of sulfur dioxide (SO₂) emissions, accounting for roughly 15–22% of China's medium-term pollution reduction targets for 2020–2025. This indicates that green credit policies, through financial leverage, have been effectively translated into environmental benefits.

Robustness checks—including propensity score matching (PSM), placebo tests, and alternative variable measures—all support this conclusion. In other words, green credit is not merely a "paper policy" but has produced quantifiable emission reduction effects.

Mechanism Analysis: Financing Constraints and Innovation Offsets

The study identifies two key transmission pathways: the financing constraint effect and the innovation offset effect.

• Financing constraint effect: The green credit policy raises the financing threshold for high-polluting firms, making it more difficult for them to obtain bank loans. This tightening of credit allocation directly limits firms' expansion investments in highly polluting capacity, forcing them to shift toward cleaner production methods.
• Innovation offset effect: To obtain green credit incentives or avoid punitive interest rates, firms are compelled to engage in green technological innovation to reduce pollution intensity per unit of output. Such innovation not only helps firms meet regulatory requirements but may also bring long-term competitive advantages, partially offsetting short-term compliance costs.These two mechanisms are not mutually exclusive but synergistic: financing constraints "push" enterprises to exit polluting pathways, while innovation compensation "pulls" them toward green trajectories.

Heterogeneity: Who Benefits More?

The effectiveness of the policy is not uniformly distributed. The study reveals three significant types of heterogeneity:

• Regional heterogeneity: Enterprises in the eastern region (economically developed, with a high degree of financial marketization) showed significantly greater improvements in environmental performance than those in the central and western regions. This suggests that the effectiveness of green credit depends on supporting financial infrastructure and enforcement capacity.
• Industry heterogeneity: Competitive industries (e.g., non-monopolistic enterprises in cement and paper) respond more sensitively to green credit, because market competition pressure amplifies the punitive effect of financing constraints.
• Ownership heterogeneity: State-owned enterprises (SOEs) demonstrated stronger environmental improvement effects than private enterprises. This may stem from SOEs' closer political ties with banks, making it easier for them to obtain green credit support after compliance, as well as their stronger execution capacity.

These differences provide direction for policy refinement: a one-size-fits-all green credit policy may exacerbate inequalities between regions and ownership types, requiring complementary measures such as differentiated subsidies and technical assistance.

Global Implications: Boundaries and Conditions of Green Financial Governance

China's experience with green credit is particularly instructive for Global South countries. Many developing countries face the dilemma of industrialization versus environmental protection, and green finance is seen as a key tool to bridge this gap. However, this study shows that the success of green credit depends on several prerequisites:

1. Strong institutional implementation: Policy effectiveness depends not only on textual design but also on regulatory intensity. China's "top-down" banking supervision system ensures the implementation of green credit guidelines, which may be difficult to replicate in countries with weak governance capacity. 2. Depth of financial markets: The eastern region performed better in part due to its more developed financial system. In economies lacking diverse financing channels, green credit may result only in "credit rationing" rather than "green innovation." 3. Enterprise innovation capacity: The innovation compensation mechanism requires enterprises to possess a certain level of R&D absorptive capacity. For small and medium-sized enterprises with low technological capability, green credit may only lead to output reduction rather than transformation.

Furthermore, the findings have implications for ESG investing. The Bloomberg ESG environmental score, as a performance metric, successfully captured the policy impact, indicating that standardized environmental scoring can be an effective tool for evaluating the effects of green finance. Investors and policymakers can use it to optimize capital allocation.

ConclusionGreen credit is not a panacea, but its empirical effects in improving the environmental performance of highly polluting enterprises are encouraging. The Chinese case proves that when financial regulation is linked to environmental goals, credit policies can generate considerable emission reduction benefits. However, regional, industrial, and ownership-based disparities in effects remind us that green finance governance must be embedded in specific institutional, market, and social contexts. For global sustainable development, this is both a source of confidence and a challenge: how to transform pilot experiences into replicable global public goods?

Future research needs to further track long-term dynamic effects and explore the synergy between green credit and other policies such as carbon pricing and environmental taxes. In the face of increasingly urgent climate crises, evidence-based policy learning is more important than ever.