["Business Strategy and the Environment, EarlyView. ", "\nABSTRACT\nThis study investigates the impact of women's representation on corporate boards on firm‐level environmental sustainability. Female board presence is measured by both the percentage of women and the number of female board members, while environmental sustainability is assessed through six indicators: total CO2 emissions, direct CO2 emissions, CO2 intensity, emission score, environmental innovation score, and resource efficiency score. Using annual data from 2000 to 2021 for 657 US firms, we employ robust panel econometric techniques that account for potential endogeneity in the models. The findings show that higher female representation on boards significantly improves environmental performance by reducing emissions and promoting innovations and resource efficiency. Further analysis confirms that corporate social responsibility (CSR) and environmental, social, and governance (ESG) strategies also play important roles in promoting sustainability. These results are consistent across alternative specifications and measurements. The empirical evidence clearly highlights a critical policy outcome: increasing gender diversity in corporate boards can be a strategic tool for advancing environmental sustainability at the firm level.\nJEL Classification: L21L22M14Q56R11\n"]