Systems, methods, devices and program products are provided for enabling users of a computing system to measure and compare the green efficiency of a set of resources used in a computing task. With the use of this information, the user can select a desired set of resources to be employed in the computing task to minimize the environmental impact of computing tasks in relation to requirements. In some embodiments, the invention creates metrics for measuring the greenness of a computing task. The metrics are calculated through analysis of the resource computation, energy consumption, consequence of computation, and dimensional characteristics of a computing task. The metrics could be beneficial or other metrics that permit the user or a processing system to make scheduling and execution decisions.