Emission data is presented as total tonnes of CO2e and tonnes of CO2e per equivalent ounce of refined silver.
Skarn recommends CO2e per equivalent ounce of refined silver as the most suitable metric for comparing operations.
For silver, E0 and E1 emissions are defined as follows:
E0: Scope 1 and 2 emissions at mine site.
E1: E0 emissions, plus emissions from dore and concentrate freight, smelting and refining.