Circular Economy Impact on Material Demand: WITCH-Material Results

This dataset contains material demand, stock, and outflow projections from the WITCH-Material 5.5 Integrated Assessment Model under different circular economy (CE) policy scenarios and climate mitigation pathways. The dataset combines: Material flows: Primary material demand, secondary material (recycling/reuse), and material outflows Climate scenarios: SSP2 (baseline), SSP2-1.5°C, and SSP2-2.0°C Circular economy policies: Narrow, Slow, Close, and All CE Policies Combined Contents Materials Covered Aluminium Steel Copper Concrete Sectors Electricity generation and transmission/distribution Transportation (cars) Variables Final Material Demand: Material inflows required for new production/infrastructure (Mt/yr) Material Stock: In-use material in infrastructure and vehicles (Mt) Material Outflow: End-of-life material becoming available for recycling/disposal (Mt/yr) Time Coverage 2005-2100 Regions 21 regions including: Brazil Canada Central & Central Asia China European Union 27 India Indonesia Japan South Korea Latin America & Caribbean Middle East & North Africa Mexico Oceania Other Europe South Asia Southeast Asia South Africa Sub-Saharan Africa Transition Economies United States World Scenarios Climate Scenarios Scenario Temperature Target SSP2 No climate policy SSP2_19 aligned with 1.5°C SSP2_26 aligned with 2.0°C Circular Economy Policies Policy Description Baseline No CE policies Narrow CE strategies to reduce demand: lightweighting, substitution (Aluminium -> Steel), car sharing, teleworking Slow CE strategies to keep materials longer being used: increased lifetime of PV and Wind Technologies and Reuse Close Recycling All CE Policies Combined effect of all CE measures Data Format Excel Spreadsheet (IAMC Format) The dataset is provided in IAMC (Integrated Assessment Modeling Consortium) standard format with columns: Column Description Model WITCH 5.5 Scenario Climate and CE policy combination Region Regional aggregate (including World) Variable Material flow indicator Unit Mt (Material Stock) or Mt/yr (Material Demand/Outflow) 2005-2100 5-yr timestep values