Judging It, Washing It: Scoring and Greenwashing Corporate Climate Disclosures using Large Language Models

Marianne Chuang, Gabriel Chuang, Cheryl Chuang, John Chuang


Abstract
We study the use of large language models (LLMs) to both evaluate and greenwash corporate climate disclosures. First, we investigate the use of the LLM-as-a-Judge (LLMJ) methodology for scoring company-submitted reports on emissions reduction targets and progress. Second, we probe the behavior of an LLM when it is prompted to greenwash a response subject to accuracy and length constraints. Finally, we test the robustness of the LLMJ methodology against responses that may be greenwashed using an LLM. We find that two LLMJ scoring systems, numerical rating and pairwise comparison, are effective in distinguishing high-performing companies from others, with the pairwise comparison system showing greater robustness against LLM-greenwashed responses.
Anthology ID:
2025.climatenlp-1.2
Volume:
Proceedings of the 2nd Workshop on Natural Language Processing Meets Climate Change (ClimateNLP 2025)
Month:
July
Year:
2025
Address:
Bangkok, Thailand
Editors:
Kalyan Dutia, Peter Henderson, Markus Leippold, Christoper Manning, Gaku Morio, Veruska Muccione, Jingwei Ni, Tobias Schimanski, Dominik Stammbach, Alok Singh, Alba (Ruiran) Su, Saeid A. Vaghefi
Venues:
ClimateNLP | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
17–31
Language:
URL:
https://preview.aclanthology.org/mtsummit-25-ingestion/2025.climatenlp-1.2/
DOI:
10.18653/v1/2025.climatenlp-1.2
Bibkey:
Cite (ACL):
Marianne Chuang, Gabriel Chuang, Cheryl Chuang, and John Chuang. 2025. Judging It, Washing It: Scoring and Greenwashing Corporate Climate Disclosures using Large Language Models. In Proceedings of the 2nd Workshop on Natural Language Processing Meets Climate Change (ClimateNLP 2025), pages 17–31, Bangkok, Thailand. Association for Computational Linguistics.
Cite (Informal):
Judging It, Washing It: Scoring and Greenwashing Corporate Climate Disclosures using Large Language Models (Chuang et al., ClimateNLP 2025)
Copy Citation:
PDF:
https://preview.aclanthology.org/mtsummit-25-ingestion/2025.climatenlp-1.2.pdf