贝佐斯地球基金RMI2024技术化温室气体去除的规模化2050年全球路线图英文版109页_15mb

Summary of "Scaling Technological Greenhouse Gas Removal: A Global Roadmap to 2050"

Core Content

This document outlines a comprehensive global roadmap to scale technological greenhouse gas removal (GHGR) by 2050. It emphasizes the urgent need for GHGR due to the current climate crisis and the limitations of emissions reduction alone. The roadmap is a collaborative effort by the Bezos Earth Fund and the Rocky Mountain Institute (RMI), incorporating expert input from multiple stakeholders.

Main Goals

• Achieve 10 gigatons (Gt) of CO₂ removal per year by 2050.
• Address GHG removal for all major greenhouse gases, including CO₂, methane (CH₄), and nitrous oxide (N₂O).
• Ensure responsible and just deployment of GHGR technologies to avoid harm to communities and promote equity.
• Establish a timeline for scaling GHGR across three decadal periods (2024–2030, 2030–2040, 2040–2050), with specific milestones and targets.

Key Views

• GHGR is unavoidable due to the existing and ongoing greenhouse gas emissions that are difficult to fully abate.
• Technological GHGR is essential to meet the scale of removal required, as nature-based approaches alone cannot suffice.
• GHGR must scale rapidly within a 25-year timeframe, which is a significant challenge given the current low level of deployment (less than 1 Mt CO₂/y in 2023).
• Collaboration across sectors and stakeholders is critical, including governments, funders, industry, researchers, and civil society.
• GHGR must be integrated into decarbonized systems and be efficient and unobtrusive in its operation by 2050.

Key Information

Scaling Targets

• 2030: Achieve ~285 Mt CO₂/y of removals.
• 2040: Achieve ~4.5 Gt CO₂/y of removals.
• 2050: Achieve 10 Gt CO₂/y of removals.

Decadal Initiatives

1. 2024–2030:

   • Enable the emergence of GHGR.
   • Lay the foundation for a larger GHGR industry.
   • Focus on research, development, demonstration, and community engagement.

2. 2030–2040:

   • Enable widespread adoption of GHGR.
   • Develop a portfolio of low-cost, scalable, and community-oriented approaches.
   • Establish global MRV systems, supply chains, and certification markets.

3. 2040–2050:

   • Expand GHGR to meet the 10 Gt CO₂/y target.
   • Require sustained expansion of capacity, with 500–800 Mt CO₂/y added each year.
   • Address planetary resource constraints and ensure global standards and procurement.

Technology Categories

The roadmap covers five main categories of GHGR:

1. Air CDR:

   • Direct air capture (DAC) and other machine-based CO₂ removal technologies.

2. Ocean CDR:

   • Includes ocean alkalinity enhancement (OAE) and indirect water capture (IWC).

3. Land CDR:

   • Involves photosynthetic biomass production and carbon storage, such as biochar, bio-oil, and BECCS.

4. Rock CDR:

   • Reacts CO₂ with alkaline minerals to form carbonates or bicarbonates.

5. Non-CO₂ GHGR:

   • Technologies for removing methane and nitrous oxide.

Thematic Areas for Stakeholder Action

• Science and Technology (S&T):

  • Advance basic and applied research.
  • Develop and refine GHGR technologies.
  • Improve understanding of non-CO₂ GHG removal.

• Socio-Behavioral and Communities (SB&C):

  • Engage local and vulnerable communities.
  • Ensure just and equitable deployment.
  • Promote workforce development and public awareness.

• Finance and Markets (F&M):

  • Create market infrastructure and demand.
  • Develop compliance and voluntary markets.
  • Support investment and innovation in GHGR.

• Policy and Regulation (P&R):

  • Establish global and local regulations.
  • Develop clear permitting and certification frameworks.
  • Implement policies to drive demand for GHGR.

Methodology

The roadmap is structured as a highly cross-linked document, with technical and thematic areas overlapping to ensure a holistic approach. It uses initiatives, actions, checkpoints, and decision points to guide stakeholders through a series of steps necessary to achieve the 2050 goals. The methodology is designed to work backward from the 2050 target, ensuring that all required actions are aligned and timed appropriately.

Uncertainties and Challenges

• Technological readiness: Many GHGR technologies are still in early stages, requiring significant investment in R&D and testing.
• Environmental and social risks: GHGR can have unintended consequences, such as ecological disruption or social inequities, which must be mitigated through rigorous testing and community engagement.
• Policy and market development: GHGR lacks a natural market and will require policy-driven demand, such as compliance markets and regulatory frameworks.
• Resource constraints: Sustained expansion of GHGR will require access to sustainable biomass, alkaline minerals, and low-carbon energy.

Conclusion

This roadmap is a critical tool for aligning global efforts toward scaling GHGR technologies. It sets clear targets, outlines a strategic path, and emphasizes the importance of collaboration, innovation, and responsible deployment. The goal is to ensure that by 2050, GHGR is a mature, efficient, and widely adopted solution to combat climate change and secure a sustainable future for both people and the planet.

Appendix Highlights

• Appendix A: Lists other relevant GHGR roadmaps for comparison and context.
• Appendix B: Defines acronyms and abbreviations used throughout the document.
• Appendix C: Provides detailed notes on the figures and data sources.

Citation and License

• Citation: Bezos Earth Fund and RMI (2024). Scaling Technological Greenhouse Gas Removal: A Global Roadmap to 2050. https://www.bezosearthfund.org/uploads/scaling-technological-ghg-removal-roadmap-2050.pdf
• License: Creative Commons CC BY-SA 4.0. The roadmap is open for reference, sharing, and building upon, provided proper attribution and sharing under the same license.

Contacts

• Bezos Earth Fund: GHGRemovalinitiative@bezosearthfund.org
• Rocky Mountain Institute: GHGR@rmi.org