Managing our value chain emissions In FY2018, Scope 3 emissions in our value chain were 596 million tonnes of CO2-e. The most significant contributors to this total were emissions from the downstream processing and use of our products, which accounted for around 97 per cent of total Scope 3 emissions. In particular, Scope 3 emissions emanating from the steelmaking process (the processing and use of our iron ore and metallurgical coal) accounted for over 65 per cent of the total. (2)