Net-Zero to Net-Negative: A Guide for Leaders on Carbon Removal

The document argues that carbon removal is an essential complement to deep emission cuts to limit global warming in line with the Paris Agreement. It outlines a mitigation hierarchy where removals are used only for hard-to-abate emissions, Earth system feedbacks, and historical legacy emissions. The guide categorizes removal methods into nature-based, engineered, and hybrid solutions, emphasizing the need for a diversified portfolio that balances the durability of the emission source with the durability of the storage sink. It specifically warns against 'borrowing from the future' by counting carbon as removed before it is safely stored and advocates for systemic impact through R&D funding and policy advocacy rather than a least-cost tactical approach.

• To limit global warming to 1.5°C or 2°C, the world must reduce emissions by at least 50% by 2030, reach net-zero by 2050, and achieve net-negative emissions thereafter, requiring the safe removal and storage of 5 to 20 billion tons of CO2 annually by mid-century.
• Carbon removal should follow a strict mitigation hierarchy, serving three specific purposes: compensating for hard-to-reduce emissions, counteracting emissions from the biosphere caused by climate change, and addressing the historical legacy of past emissions.
• There is a critical imbalance in carbon stocks; current strategies often convert fossil carbon from the geosphere into biological carbon in the biosphere, which is constrained by land availability and competing uses like food production.
• The biosphere is an increasingly risky storage location due to human-caused warming and feedback loops, such as wildfires and melting tundra, which could flip the biosphere from a net carbon sink to a net source.
• Corporate leaders should adopt a 'durability matching' approach, ensuring that emissions from high-durability sources (like fossil fuels) are balanced with high-durability storage (like geological reservoirs).
• The guide identifies eight broad carbon removal pathways with varying costs and risks: forestation ($0–$50/tCO2), soil sequestration ($0–$50/tCO2), blue carbon (uncertain), accelerated weathering (~$20–$1,000/tCO2), biochar ($30–$120/tCO2), BiCRS ($50–$100/tCO2), DACCS (~$350–$700/tCO2), and other ocean CDR (uncertain).

APA

World Economic Forum (2021). Net-Zero to Net-Negative: A Guide for Leaders on Carbon Removal. https://www3.weforum.org/docs/WEF_Net_Zero_to_Net_Negative_A_Guide_for_Leaders_on_Carbon_Removal_2021.pdf

Chicago

World Economic Forum. Net-Zero to Net-Negative: A Guide for Leaders on Carbon Removal. 2021. https://www3.weforum.org/docs/WEF_Net_Zero_to_Net_Negative_A_Guide_for_Leaders_on_Carbon_Removal_2021.pdf.

Wikipedia

{{cite report |author=World Economic Forum |title=Net-Zero to Net-Negative: A Guide for Leaders on Carbon Removal |date=November 2021 |url=https://www3.weforum.org/docs/WEF_Net_Zero_to_Net_Negative_A_Guide_for_Leaders_on_Carbon_Removal_2021.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{worldeconomicforum2021netzero, author = {{World Economic Forum}}, title = {{Net-Zero to Net-Negative: A Guide for Leaders on Carbon Removal}}, institution = {World Economic Forum}, year = {2021}, month = nov, url = {https://www3.weforum.org/docs/WEF_Net_Zero_to_Net_Negative_A_Guide_for_Leaders_on_Carbon_Removal_2021.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }