Rising climate risk pushes firms toward rapid green innovation expansion

Rising climate risk is increasingly linked to a widening gap between the quantity and quality of corporate green innovation, raising concerns about the emergence of "innovation bubbles" that may undermine the United Nations' sustainable development goals (SDGs).

The study, titled "Climate Risk and Corporate Green Innovation Bubbles: Evidence from China," published in Sustainability, examines how climate risk influences corporate green innovation behavior using data from Chinese A-share listed firms between 2015 and 2023. The research identifies a significant positive relationship between climate risk and the formation of green innovation bubbles, highlighting how firms respond strategically to external pressures by expanding visible innovation outputs without equivalent improvements in quality.

Climate risk drives expansion in green innovation but distorts quality

The study finds that climate risk acts as a powerful driver of corporate green innovation activity, pushing firms to increase their environmental initiatives in response to regulatory pressure, investor expectations, and broader sustainability narratives. However, this expansion is not always matched by improvements in innovation quality.

Green innovation, as defined in the study, includes activities such as the development of environmentally friendly technologies and the filing of green patents. While the number of green patents has grown rapidly, the research highlights a growing disconnect between the volume of patent applications and their actual technological or environmental value.

This phenomenon, described as a "green innovation bubble," reflects a situation where firms increase the quantity of innovation outputs without corresponding gains in substantive quality. The study shows that climate risk significantly amplifies this mismatch, leading to a pattern of "quantity expansion" coupled with "quality lag."

Unlike conventional business risks, climate risk is characterized by high uncertainty, long-term impacts, and strong narrative influence. As climate-related concerns become more prominent, firms are incentivized to demonstrate their adaptability and commitment to sustainability.

However, because the outcomes of green innovation are often difficult to verify in the short term, firms may prioritize actions that are more visible and easier to signal to external stakeholders. This includes increasing patent filings or launching new initiatives that enhance their environmental image, even if these efforts do not lead to meaningful technological advancements.

The result is a distortion in innovation activity, where external recognition and signaling take precedence over substantive progress. This dynamic raises concerns about the effectiveness of green innovation as a tool for addressing climate challenges, as resources may be allocated toward activities that generate visibility rather than real impact.

Investor attention, ESG divergence, and analyst coverage amplify the effect

The study identifies three key mechanisms through which climate risk intensifies the green innovation bubble: green investor attention, ESG rating divergence, and analyst coverage. These factors collectively reshape the external environment in which firms operate, creating incentives for strategic rather than substantive innovation.

Green investor attention plays a central role by directing capital toward firms perceived as leaders in sustainability. As climate risk rises, investors increasingly seek to align their portfolios with environmental goals, placing greater emphasis on green innovation as a signal of future performance.

This heightened attention increases the rewards associated with visible green activities, encouraging firms to expand their innovation outputs to meet investor expectations. However, because investors often rely on observable indicators such as patent counts, firms may focus on increasing quantity rather than improving quality.

ESG rating divergence introduces additional complexity. Different rating agencies often evaluate firms' environmental performance using varying criteria, leading to inconsistencies in ESG scores. As climate risk becomes more prominent, these differences can widen, creating uncertainty about how green innovation is assessed.

This divergence allows firms to benefit from favorable interpretations of their activities, even when the underlying quality is uncertain. In such an environment, symbolic innovation can receive similar recognition to substantive innovation, further contributing to the expansion of the green innovation bubble.

Analyst coverage adds another layer of influence by shaping market narratives around corporate sustainability. As analysts increase their focus on climate-related issues, they play a key role in interpreting and disseminating information about firms' green innovation efforts.

According to the research, greater analyst attention tends to amplify optimistic expectations about firms' future performance, particularly when innovation outcomes are uncertain. This forward-looking emphasis can reinforce the perception of green innovation as a driver of growth, encouraging firms to maintain high levels of visible activity to sustain market interest.

Together, these mechanisms create a feedback loop in which climate risk drives external attention, which in turn incentivizes firms to expand their innovation outputs. While this process can stimulate activity, it also increases the likelihood of misalignment between quantity and quality.

Uneven impact across firms highlights structural challenges

The study also reveals significant variation in how climate risk affects different types of firms, pointing to broader structural challenges in the transition toward sustainable innovation.

SMEs are found to be more vulnerable to the formation of green innovation bubbles. Compared to larger firms, these companies often face greater resource constraints and may lack the capacity to develop high-quality innovations. As a result, they are more likely to rely on visible but less substantive activities to meet external expectations.

Investor sentiment further influences the extent of the bubble. Firms that attract more optimistic investor attention tend to experience stronger effects, as heightened expectations amplify pressure to demonstrate innovation performance. This can lead to increased reliance on symbolic actions that boost short-term visibility.

Firms with stronger ESG performance are also more prone to green innovation bubbles. While these companies are generally better positioned to attract investment and attention, they may face diminishing returns from additional innovation efforts. As a result, they may expand their activities in ways that prioritize quantity over quality, particularly under heightened climate risk.

These findings suggest that the relationship between climate risk and innovation is not uniform, but is shaped by firm characteristics, market dynamics, and external pressures. Addressing these differences will be critical for ensuring that green innovation contributes effectively to sustainability goals.

Strong governance can help curb innovation distortions

Firms with stronger internal control systems are better able to manage the pressures associated with climate risk and maintain a focus on substantive innovation. Improved governance structures help reduce the likelihood of strategic behavior driven by external expectations, ensuring that innovation efforts are aligned with long-term objectives. This includes better monitoring of investment decisions, more transparent disclosure practices, and stronger alignment between environmental goals and business strategy.

The research shows that as internal control quality improves, the positive relationship between climate risk and the green innovation bubble weakens. This suggests that governance plays a critical role in balancing the need for innovation with the need for quality and effectiveness.

From a policy perspective, the findings point to the importance of strengthening regulatory frameworks and improving ESG evaluation systems. By reducing inconsistencies in ESG ratings and promoting more accurate assessments of innovation quality, regulators can help align incentives with genuine sustainability outcomes.