Abstract: A system for tracking environmental performance of a producer of environmental emissions and of associating individual environmental emission reductions to the producer, to a variety of collected data, or both includes selecting a production practice of the producer and an appropriate protocol for converting the production practice to a measure of environmental emissions. An identifier for each quantifiable unit of environmental emissions a sequence portion characterizing a succession of units, a vintage portion characterizing the time period for the production practice, a protocol characterizing portion and a geographical reference portion. Such an identifier allows for a tracking of the processes that resulted in the environmental emissions measurement.