The current technology's upheaval in the electricity sector is leading to a need for new distributed control schemes for distributed electricity generation. In order to enable optimization of electricity generation and consumption for global objectives in distributed search spaces, meta-models of constrained spaces of operable schedules are indispensable for efficient communication. In order to qualify for being a green technology, indicators for individual environmental performance have to be incorporated into these meta-models. We here present insight into ongoing work concerning the integration of environmental performance indicators into the distributed control of energy resources. In order to ensure interoperability on the indicators, we will discuss the need for an ontology defining the description of such indicators.