Geochemical Negative Emissions Technologies: Part II. Roadmap

Cara N. Maesano*, James S. Campbell, Spyros Foteinis, Veronica Furey, Olivia Hawrot, Daniel Pike, Silvan Aeschlimann, Paul L. Reginato, Daniel R. Goodwin, Loren L. Looger, Edward S. Boyden, Phil Renforth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
107 Downloads (Pure)


Geochemical negative emissions technologies (NETs) comprise a set of approaches to climate change mitigation that make use of alkaline minerals to remove and/or permanently store carbon dioxide (CO2) as solid carbonate minerals or dissolved ocean bicarbonate ions. This roadmap accompanies the comprehensive review of geochemical NETs by the same authors and offers guidance for the development and deployment of geochemical NETs at gigaton per year (Gt yr.−1) scale. We lay out needs and high-priority initiatives across six key elements required for the responsible and effective deployment of geochemical NETs: (i) technical readiness, (ii) social license, (iii) demand, (iv) supply chains, (v) human capital, and (vi) infrastructure. We put forward proposals for: specific initiatives to be undertaken; their approximate costs and timelines; and the roles that various actors could play in undertaking them. Our intent is to progress toward a working consensus among researchers, practitioners, and key players about initiatives that merit resourcing and action, primarily focusing on the near-term.

Original languageEnglish
Article number945332
JournalFrontiers in Climate
Publication statusPublished - 9 Sept 2022


  • carbon dioxide removal
  • CDR roadmap
  • CO mineralization
  • enhanced weathering
  • geochemical CDR
  • negative emissions roadmap
  • negative emissions technologies
  • ocean alkalinity enhancement

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Science (miscellaneous)
  • Pollution
  • Atmospheric Science
  • Management, Monitoring, Policy and Law


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