The importance of external engagement and the growing public concern over environmental reporting have prompted businesses all over the world to look for measures to lessen their negative environmental effects. This is accomplished by providing stakeholders with high-quality environmental information. In developed economies, the role of the Global Reporting Initiative in establishing environmental reporting performance indicators have received a great deal of attention. However, developing economies have less research on the subject. The purpose of this study, therefore, was to determine how media exposure, environmental assurance statements, and stakeholder power related to firm external engagement attributes affected the quality of environmental reporting in Nigeria. From the secondary data, the annual reports and websites of listed companies for the years 2017 through 2021 were used. The study adopted the panel least squares method to analyse the data gathered from the annual reports and corporate websites of the listed companies in Nigeria. According to study results, there is a strong positive relationship between media exposure, stakeholder power, and quality of environmental reporting. In addition, anegligiblepositive link between environmental assurance statementsand the quality of environmental reporting exists. The study concludes that by following international best practices for environmental reporting and providing stakeholders with adequate information, businesses can increase external participation and close the reporting gap.

Keywords : Media exposure, Environmental assurance, Stakeholder power, Environmental reporting quality