Memorandum for the Petitioners | 32 Agreement’s temperature goals or more stringent science-based climate recovery targets, in scenarios with limited reliance on Carbon Dioxide Removal (CDR), such as in P1.% 5.18.6. The JPCC SR 1.5 shows that choosing a pathway like P1 that limits global warming to 1.5°C with no or limited overshoot results in lesser impacts and fewer associated challenges as compared to relying on overshoot trajectories outlined in pathways 3 and 4 of the IPCC SR 1.5. “Reversing warming after an overshoot of 0.2°C or larger during this century would require upscaling and deployment of CDR at rates and volumes that might not be achievable given considerable implementation challenges.” 5.18.7. Delayed action, therefore, comes with more risks and less benefits, given that (CDR) deployed at scale is unproven and comes with many barriers, and remains “subject to multiple challenges feasibility from and delayed sustainability actions constraints.” °’ “The to reduce greenhouse gas emissions include the risk of cost escalation, lock-in in carbonemitting infrastructure, stranded assets, and reduced flexibility in future response options in the medium to long-term.”*® The IPCC SR 1.5 shows that the faster emissions are cut, the greater the reduction in warming and related risks and costs.” 5.18.8. Selecting such a scenario (P1) also has benefits for sustainable development and the sustainable development goals (SDGs), while living standards in the Global South rise.! “1.5°C pathways that include low energy demand (e.g., see Pl in Figure SPM.3a and SPM.3b), low material consumption, and low GHG-intensive food consumption have the most pronounced synergies and the lowest number of trade- offs with respect to sustainable development and the SDGs.”!"! 5.18.9. More specifically, to meet the 1.5°C goal of the Paris Agreement, global CO2 emissions would need to be reduced by 58% by 2030 and reach net zero by around 2050 at the latest, with substantial reductions in other compared to 2010 levels, based on the P1 pathway.’ GHGs % Joint Summary of the Amicus Curiae Briefs, supra note 50, p. 9. 6 IPCC (2018) Summary for Policymakers, supra note 89, Sec. D1.2. 57 Id, Sec. C3. % Id, Sec. D1.3. °° Greenpeace Southeast Asia. (2018), Holding Your Government Accountable for Climate Change: A People’s Guide, p. 68, available at https://storage.googleapis.com/planet4-internationalstateless/2018/12/4fdd4d8a-peoples_guide_fnl_2.pdf (last accessed 12 September 2019). 199 IPCC (2018) Summary for Policymakers, supra note 89, Figure SPM.3b, p. 33. 101 Id, Sec. D4.2. '©2 The P1 pathway is the Low Energy Demand scenario by Grubler ef al. (2018), which assumes oil use to be almost halved (-46 %) and gas use to decline by about one third (-37%) between 2020 and 2030. See: