37
Table 5.2: Potential greenhouse gas emission reductions of selected individual commitments and initiatives (in MtCO2 1) Individual commitments
Actors and sectors
CDP (2016)
ICLEI (2015)
Kura- mochi et al. (2017)
Roelf- sema (2017)
Data- Driven Yale, New Climate Institute, and PBL (2018)
Cities and municipa- lities
Regions Business
1,000
179 by 2035
360–560 by 2025
3–30
1,550– 2,200 (current policy
scenario 1a);
200–700 (NDC
scenario 1b)
ICIs
Number of actors or initiatives quantified
Baseline scenario of the study
1,089 compa- nies
116 cities 54 cities, 22 regions, 250
compa- nies
Not
specified - variable according to
individual company actor
Not
specified - variable according to
individual city actor
Current national policies scenario
Current national policies + NDCs
25 cities
2,175 compa- nies, 76 regions, 5,910 cities
Current policy
scenario and NDCs scenario
155
busines- ses, 115
cities, 20 states
Business as usual
Business as usual (no policy baseline)
Compared to ‘reference technology scenario’ that
includes current policies and the NDCs
Overlaps quantified?
Note: This table only evaluates reports that include estimated impact in 2025/2030 and excludes those with pre-2025 or post-2030 assessment timeframes. Source: Adapted from Hsu et al. (forthcoming).
Business as usual (no policy baseline)
Business as usual (no policy baseline)
Current national policies scenario
Counter- factual (no policy baseline)
Current national policies scenario plus NDCs
Current policy
scenario
Current policy
scenario and NDCs Scenario
228 cities 110 regional govern- ments
360 cities 9,149 cities
5 ICIs
including ~ 300 compa- nies
5,500 11 ICIs
5,000– 11,000
19 ICIs
600+ cities
15,000– 23,000
21 ICIs 2) Single initiatives
Ameri ca’s Pledge (2018)
Arup
and C40 Cities for Climate Leader- ship
Network (2014)
500 in 2025
.026 in 2025
402 550
3,200– 4,200
The
Climate Group
and CDP, Compact of States and
Regions (2017)
740 1,400 3,700
Compact of Mayors (2015)
Global Covenant of Mayors (2018)
e/year in 2025/2030, by study). 3) Scaled-up potential of multiple initiatives
CDP and We Mean Business (2016)
Roelfsema et al. (2018)
Graichen et al., (2017)
Erickson and Tempest (2014)
Data- Driven Yale, New Climate Institute, and PBL (2018)
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