“…As environmental regulations become stricter and the "double-carbon target" is implemented, the increasing risk of environmental violations increases the chance that heavily polluting enterprises will not be able to repay their debts (Guo et al, 2022;Lian et al, 2022). Banks, as creditors, bear greater investment risks than shareholders, while corporate managers, in pursuit of their own interests or short-term interests, tend to reduce investment in real enterprises and tend to invest idle funds in financial products; however, investments in financial products entail great uncertainty, and once such an investment fails, a major debt crisis in terms of corporate funds may arise and harm the interests of creditors (Hu et al, 2020;Zhang et al, 2021;Zhu, 2022;Ge and Zhu, 2022). Therefore, banks apply credit rationing to heavily polluting enterprises to mitigate credit and environmental risks and safeguard their own credit quality.…”