Extended Data Fig. 1: Framework of the NZP-steel model for plant-level technology pathways toward cost-effective global carbon-neutral steel production.
From: Technological pathways for cost-effective steel decarbonization

The model comprises six modules: three bottom-up modules (plant-level datasets, decarbonization technologies, and carbon emissions), one top-down module (targets and constraints), and two integrated modules (technology selection and pathway optimization). Grey circles with numbers indicate the main algorithms, detailed in the Methodology section.