UC Davis Institute of Transportation StudiesGSTEM

Model briefing · 2026

GSTEM

The Global Sustainable Technologies, Energy and Materials Model

From clean technology sales to mine-level supply: a single model connecting the clean transport and energy transition to the critical mineral supply chain.

Vehicle demand

Energy & CO₂

Cell supply chain

Mineral demand

Mine-level supply

GSTEM

The questions decision-makers are facing

Clean technology and critical mineral supply chains raise strategic questions that most models aren't built to answer.

1

What do different electrification pathways mean for national industrial strategy and investment decisions?

2

How much critical mineral demand will the clean energy transition create — and when will it be needed?

3

Can global mining and processing capacity keep pace — where do bottlenecks emerge first?

4

Which policy and technology choices can help manage mineral intensity? Electrification pace, battery chemistry, recycling, used-vehicle trade.

5

Where are the batteries actually made — and how exposed is each market to the countries that build its cells?

6

Where does supply chain concentration create geopolitical and energy-security risk — and for whom?

GSTEM

Why existing tools fall short

Transportation, energy and minerals analysis have developed in separate silos — leaving the complex connection between demand and supply largely invisible.

Transport & energy models

Detailed on vehicles, electricity, fuels, and emissions — but treat supply chains and trade as an afterthought.

+

Mining & mineral models

Detailed on mine-level supply and cost — but disconnected from the technology and policy choices that drive demand.

GSTEM bridges both

One integrated model that traces clean technology choices and market demand all the way through to mine-level mineral supply and cost across 50+ countries.

GSTEM

How GSTEM works

From vehicle to mine: five connected modules trace demand all the way up the supply chain.

MODULE 1

Vehicle demand & technology

  • 6 vehicle types, 50+ countries
  • Stock, sales, mileage & powertrain mix
  • Age, size segment, used-vehicle trade

MODULE 2

Energy & CO₂

  • Fuel & electricity use by country
  • Well-to-wheel CO₂ by vehicle type
  • Fuel blending & carbon intensity by scenario

MODULE 3

Cell supply chain

  • Cells attributed to their country of origin
  • Future pathways of regional production
  • Localisation and import-exposure scenarios

MODULE 4

Mineral demand

  • Battery size & chemistry scenarios
  • Li, Ni, Co, Cu, Gr
  • End-of-life scrap; non-EV battery demand

MODULE 5

Mine-level supply

  • Mine-level production cost curves
  • Merit-order supply by mineral
  • Demand-scenario impacts on specific mines

0+

Countries & regions

0+

Historical data sources

0

Projection horizon

0+

Minerals · Li Ni Co Cu Gr

GSTEM

Built for decisions, not just projections

The only global model connecting vehicle technology choices to global mine-level mineral supply.

Stress-test industrial strategy

Pressure-test national or regional strategies against realistic mineral supply and demand trajectories.

Steady state

Under stress

Strategy load test

Benchmark supply chain exposure

See where a country or region sits relative to mine-level supply and downstream mineral demands.

Concentration

Chokepoints

Dependencies

Inform investment & procurement

Ground due diligence in production costs and merit order for lithium, nickel, cobalt, graphite and copper.

Merit-order supply curveLower-cost mines first

Design credible policy scenarios

Test electrification, recycling, and trade policy choices against consistent, comparable model outputs.

GSTEM

Transport fuel projections

FIG. 01 · Transport energy use by fuel · EJ

12 regions · 2010–2060 · line marks end of history

Small-multiple charts of transport energy use by fuel for 12 regions, 2010 to 2060, showing electricity displacing gasoline and diesel
GSTEM

Well-to-wheel CO₂ emissions

FIG. 02 · Well-to-wheel CO₂ by vehicle type · Mt CO₂

12 regions · 2010–2060 · line marks end of history

Small-multiple charts of well-to-wheel CO2 emissions by vehicle type for 12 regions, 2010 to 2060, showing a global peak near 2030 followed by decline
GSTEM

EV battery chemistry, mapped up the supply chain

FIG. 03 · EV supply chain mapping · GWh

2025

Sankey diagram tracing 2025 EV battery demand from cell factories through vehicle production and sales to cathode chemistry shares

GSTEM maps battery demand and cathode chemistry from EV sales up the supply chain to the cell factory.

Cell factory

Cathode chemistry

Vehicle production

Vehicle sales

GSTEM

Who supplies each market's battery cell demand

FIG. 04 · EV battery cell supply by producing country · GWh

12 regions · 2025–2030

Stacked column charts of EV battery cell supply by producing country for China, Europe, USA and Canada, OECD Pacific and Latin America, 2025 to 2030
GSTEM

Mineral demand

FIG. 05 · Lithium demand by vehicle type · Kilotonnes

12 regions · 2010–2060 · line marks end of history

Small-multiple charts of lithium demand by vehicle type for 12 regions, 2010 to 2060, showing rapid growth after 2025 dominated by passenger cars
GSTEM

Mine openings and capacity expansions

FIG. 06 · Copper ore capacity by country · Mt

When & where mines must open or expand

World map of projected added ore capacity by country, with bubbles for additional capacity in the worst-case scenario and capacity avoided with recycling
UC Davis Institute of Transportation StudiesGSTEM
GSTEM

Three ways to engage with GSTEM

We're building GSTEM as shared infrastructure for the clean technology and critical minerals community.

1

Use the platform

Integrate GSTEM data and findings directly into your own policy planning or industry forecasts.

2

Fund the work

Support the continued development of GSTEM, helping us build and improve the model over time.

3

Collaborate on research

Partner with us as a research collaborator on specific topics within the model's scope.

Join us as we launch GSTEM at our upcoming convening in
Amsterdam · Dec 1–2.

Interest Form