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What is the Seaweed-based Products for Decarbonization Road Map?

This road map explains where seaweed-derived products may contribute to decarbonization, where uncertainties remain, and what conditions must be met for climate benefits to be realized in practice.

Who is it for?

It is intended for policymakers, funders, industry leaders, researchers, and other stakeholders seeking to understand the opportunities and challenges in the development of seaweed-based products for decarbonization.

What does it focus on?

The road map focuses on decarbonization through value chains, product pathways, process efficiency, and substitution of other products but not on seaweed as a carbon dioxide removal strategy.

What are the different sections of the road map?

The road map is divided into two types of chapters: product-specific chapters and cross-cutting chapters.

The product-specific chapters each focus on a distinct end use for seaweed:

  • Agricultural Uses — seaweed-derived biostimulants and soil amendments for land-based agriculture
  • Biofuels — seaweed as a feedstock for fuels
  • Biomaterials — seaweed as a feedstock for bioplastics, packaging, textiles, and other material applications
  • Critical Minerals — seaweed as a bioaccumulator for rare earth elements and other critical minerals needed in clean energy technologies
  • Food Products and Animal Feed — seaweed as an ingredient in human food (blue foods) and livestock/aquafeed

The cross-cutting chapters cover topics that apply across all product-specific chapters:

  • Biorefineries — cascading approaches that extract multiple co-products from a single seaweed harvest across several of the above uses
  • Cultivation and Drying Considerations — the shared upstream challenges of growing seaweed at scale and preparing biomass for processing, including strain development, offshore infrastructure, environmental impacts, and post-harvest drying

 

How do I navigate the road map?

Each chapter of the road map follows the same three-part structure, so once you learn one, you can move through any of them the same way.

The first section is the State of Approach. The sub-sections therein cover the foundational context (Overview) the current state of the Science, Technology and Engineering, Technology Readiness Level, Mitigation Potential, Product Performance, Cost and Market Adoption, Environmental Co-benefits and Risks, Social Co-benefits and Risks, and Policy and Regulation. This section answers the question: where does the field stand today?

The second section contains the Development Gaps and Needs, which identifies the obstacles and open questions nested within the State of Approach that must be resolved before the approach can scale. This section answers: what’s standing in the way?

The third section, First-Order Priorities, lays out the most critical actions needed to move forward. Sub-sections include an Overview and individual priorities, broken down into goals, key actions, and key actors. This section answers: what should happen next, and who should do it?

 

What assumptions shape the decarbonization analysis?

The analysis for decarbonization and mitigation potential is based on existing life cycle analysis (LCA) studies reviewed during the development of the road map. It looks at how seaweed performs across cultivation, preservation, processing, transport, use, and end-of-life.

How strong is the evidence today?

The evidence base is still emerging. Existing LCAs provide useful signals, but many rely on early-stage systems, limited data, and assumptions that may change as the sector matures. Many of the products in this road map are still relatively low-technology readiness (TRL). That means current findings are informative, but often not definitive.

 

Is this road map a static resource?

No. The road map is intended to be a dynamic resource to be updated as better evidence, stronger LCAs, and more mature commercial pathways emerge.

Who contributed feedback to the road map during the public comment period?

You can find a summary of feedback and subsequent revisions here.