TRL ratings in the matrix follow FIP's adaptation of the IEA 1–11 scale, grouping technologies into five maturity stages. Stages 7–11 represent the IEA Sustainable Development Scenario (SDS); stages 1–6 sit beyond it.
Headline TRL in the matrix uses Low (1–6) / Medium (7–8) / High (9–11) bands. Tech-specific TRL detail (e.g. Hydrogen Blue 8–9 vs Green 7–9 vs methane pyrolysis 3–7) is captured in the source citation when a technology is clicked.
Environmental impact is measured as cumulative CO₂ reduction 2020–2050 per technology vs. the total cumulative CO₂ reduction required under the IEA Net Zero to 2050 scenario. The chart below (FIP appendix) maps each FIP technology bucket to its IEA NZE reduction levers via the brackets on the right side.
How to read the chart: the left panel shows global net CO₂ emissions by sector under NZE; the right panel decomposes the average annual reductions by lever in 5-year steps. The brackets on the far right of the bar chart, and the two boxes below it, define which IEA levers each FIP technology corresponds to (e.g., "Renewable" → "Wind and solar"; "Batteries / Electrification" → "Electric vehicles + Other electrification + Behaviour"; "Carbon Removals, Nature Climate Solutions, Alternative Proteins & Agriculture" → "Behaviour and avoided demand").
Source: IEA Net Zero to 2050 (NZE) scenario; FIP analysis. Chart reproduced from FIP analysis.