In this paper, we examine the relationship between the adoption of blockchain technology and environmental efficiency using a sample of U.S. firms over the 2015-2019 period. Our results show that the adoption of blockchain technology is positively and significantly associated with environmental efficiency, suggesting that the use of Blockchain improves environmental sustainability. In further analyses, we find that the relationship between Blockchain and environmental efficiency is more pronounced for firms in the financial and technological industries. Our findings are also robust to other methods that control for endogeneity, including the difference in difference regressions and Propensity Score Matching. Overall, we provide empirical evidence that can incentivize business leaders and policymakers to adopt innovative technologies such as Blockchain.