This article evaluates the effect of different human resource management (HRM) practices on organizations’ environmental performance. We develop a model to evaluate the influence of a broad range of HRM practices, including environmental performance criteria in managers’ performance evaluations and two types of internal corporate social responsibility (CSR) practices: socially responsible employee benefits and corporate volunteering practices. To this end, we analyze a sample of 142 manufacturing companies that have completed B Lab’s Impact Assessment process to certify their environmental performance. (...) The results show that including environmental criteria in a higher proportion of managers’ performance evaluations directly impacts organizations’ environmental performance and strengthens the positive effect of other environmental management practices. The findings also demonstrate the direct effects of both types of CSR practices on an organization’s environmental performance. Our study advances recent work on Green HRM and CSR by identifying the specific HRM practices that allow organizations to move from being part of the world’s environmental problem to being part of the solution. (shrink)