Table SPM-2. (WGIII) Global economic mitigation potential in 2030 estimated from top-down studies.
| Carbon price |
Economic potential |
Reduction relative to SRES A1 B (68 GtCO2‑eq/yr) |
Reduction relative to SRES B2 (49 GtCO2‑eq/yr) |
| (US$/tCO2‑eq) |
(GtCO2‑eq/yr) |
(%) |
(%) |
(GreenFacts note: The mitigation potential is expressed in Giga tonnes of CO2 equivalent per year.
1 Giga tonne = 1 000 000 000 tonnes) |
| 20 |
9-18 |
13-27 |
18-37 |
| 50 |
14-23 |
21-34 |
29-47 |
| 100 |
17-26 |
25-38 |
35-53 |
Source: IPCC Climate Change 2007: 
"Mitigation, Summary for Policymakers", p9
