Cumulative direct emission reductions by current technology maturity category in the sustainable development scenario between 2020 and 2050

Notes

Emission reductions are measured relative to the Stated Policies Scenario. Mature = all designs and underlying components at TRL 11; early adoption = at least one underlying design at TRL ≥ 9 and others at lower TRLs; demonstration = no underlying design at TRL ≥ 9, but at least one design at TRL 7 or 8; prototype = no underlying design at TRL 7 or 8, but with at least one design at TRL ≤ 6.