Previous empirical evidence has shown the effect of most corporate governance mechanisms on corporate social responsibility and environmental disclosure. However, there is scant empirical evidence that examines the influence of liberal countries, developed market economies, and board structures on environmental disclosure. Thus, this research aims to explore how liberal and developed countries and board structures affect environmental reporting. We hypothesise a linear and positive association between companies located in countries with liberal and developed market economies and environmental reporting. Moreover, we hypothesise that one‐tier board structures negatively affect environmental disclosure. Focusing on 13,100 companies domiciled in 39 different countries from 2005 to 2015, it is established that those companies located in liberal and developed economies are more likely to disclose environmental information, whereas one‐tier boards have a negative effect.