Editing IPCC:AR6/SR15/Chapter-2 (section)

==== Overview of Key Characteristics of 1.5°C Pathways ====

{| class="wikitable"
|-
! 1.5°C Pathway Characteristic
! Supporting Information
! Reference
|-
| Rapid and profound near-term decarbonisation of energy supply
| Strong upscaling of renewables and sustainable biomass and reduction of unabated (no CCS) fossil fuels, along with the rapid deployment of CCS, lead to a zero-emission energy supply system by mid-century.
| Section 2.4.1<br />
Section 2.4.2
|-
| Greater mitigation efforts on the demand side
| All end-use sectors show marked demand reductions beyond the reductions projected for 2°C pathways. Demand reductions from IAMs for 2030 and 2050 lie within the potential assessed by detailed sectoral bottom-up assessments.
| Section 2.4.3
|-
| Switching from fossil fuels to electricity in end-use sectors
| Both in the transport and the residential sector, electricity covers markedly larger shares of total demand by mid-century.
| Section 2.4.3.2<br />
Section 2.4.3.3
|-
| Comprehensive emission reductions are implemented in the coming decade
| Virtually all 1.5°C-consistent pathways decline net annual CO <sub>2</sub> emissions between 2020 and 2030, reaching carbon neutrality around mid-century. In 2030, below-1.5°C and 1.5°C-low-OS pathways show maximum net CO <sub>2</sub> emissions<br />
of 18 and 28 GtCO <sub>2</sub> yr <sup>−1</sup> , respectively. GHG emissions in these scenarios are not higher than 34 GtCO <sub>2</sub> e yr <sup>−1</sup> in 2030.
| Section 2.3.4
|-
| Additional reductions, on top of reductions from both CO <sub>2</sub> and<br />
non-CO <sub>2</sub> required for 2°C,<br />
are mainly from CO <sub>2</sub>
| Both CO <sub>2</sub> and the non-CO <sub>2</sub> GHGs and aerosols are strongly reduced by 2030 and until 2050 in 1.5°C pathways.<br />
The greatest difference to 2°C pathways, however, lies in additional reductions of CO <sub>2</sub> , as the non-CO <sub>2</sub> mitigation<br />
potential that is currently included in integrated pathways is mostly already fully deployed for reaching a 2°C pathway.
| Section 2.3.1.2
|-
| Considerable shifts in investment patterns
| Low-carbon investments in the energy supply side (energy production and refineries) are projected to average<br />
1.6–3.8 trillion 2010USD yr <sup>−1</sup> globally to 2050. Investments in fossil fuels decline, with investments in unabated coal halted by 2030 in most available 1.5°C-consistent projections, while the literature is less conclusive for investments in unabated gas and oil. Energy demand investments are a critical factor for which total estimates are uncertain.
| Section 2.5.2
|-
| Options are available to align 1.5°C pathways with sustainable development
| Synergies can be maximized, and risks of trade-offs limited or avoided through an informed choice of mitigation strategies. Particularly pathways that focus on a lowering of demand show many synergies and few trade-offs.
| Section 2.5.3
|-
| CDR at scale before mid-century
| By 2050, 1.5°C pathways project deployment of BECCS at a scale of 3–7 GtCO <sub>2</sub> yr <sup>−1</sup> (range of medians across 1.5°C pathway classes), depending on the level of energy demand reductions and mitigation in other sectors. Some 1.5°C pathways are available that do not use BECCS, but only focus terrestrial CDR in the AFOLU sector.
| Section 2.3.3, 2.3.4.1
|}

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