Table 3. Estimated average annual carbon benefit (million tCO2e) attributable to use of mass timber (CLT and glulam) based constructions in projected four-stories-and-higher residential and nonresidential buildings in the United States under different shared socioeconomic pathways (SSPs), and market adoption scenarios, 2020–2070.
| Scenario | Avoided fossil emissions | CO2 stored in mass timber | Total CO2 benefit | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SSP1 | SSP2 | SSP3 | SSP4 | SSP5 | SSP1 | SSP2 | SSP3 | SSP4 | SSP5 | SSP1 | SSP2 | SSP3 | SSP4 | SSP5 | |
| Low | 0.87 | 0.84 | 0.66 | 0.79 | 1.18 | 3.00 | 2.86 | 2.26 | 2.71 | 4.06 | 3.87 | 3.70 | 2.91 | 3.50 | 5.24 |
| Medium | 1.36 | 1.31 | 1.03 | 1.24 | 1.82 | 4.64 | 4.44 | 3.52 | 4.21 | 6.21 | 6.00 | 5.75 | 4.56 | 5.45 | 8.02 |
| High | 1.76 | 1.69 | 1.34 | 1.60 | 2.33 | 5.95 | 5.71 | 4.55 | 5.42 | 7.90 | 7.71 | 7.40 | 5.89 | 7.02 | 10.23 |
| 100% | 2.82 | 2.71 | 2.19 | 2.58 | 3.65 | 9.91 | 9.55 | 7.74 | 9.10 | 12.84 | 12.73 | 12.26 | 9.93 | 11.68 | 16.49 |