message_ix_models.tests.project.ssp.test_transport.SPECIES

message_ix_models.tests.project.ssp.test_transport.SPECIES = {'BC', 'CH4', 'CO', 'CO2', 'N2O', 'NH3', 'NOx', 'OC', 'Sulfur', 'VOC'}

Emissions species codes appearing in the IAMC-structured / reported data; these are different from those internal to the model.