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This discussion paper evaluates the Emission Unit Eligibility Criteria (EUCs) for the International Civil Aviation Organization's (ICAO) Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA), proposing refinements to five key quality criteria to ensure environmental integrity.

This research paper proposes a typology and design options for limits on the international transfer of "hot air"—emissions reductions that occur because a country's mitigation targets are higher than its projected emissions—to protect the environmental integrity of the Paris Agreement.

This research paper identifies factors influencing the environmental integrity of international carbon market mechanisms under the Paris Agreement and suggests that policy-makers use a combination of approaches to mitigate associated risks.

This discussion paper examines the environmental risks and challenges associated with including forest offset credits in international carbon markets, specifically under Article 6 of the Paris Agreement and the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA).

This technical note from the Partnership for Market Readiness (PMR) provides guidance on developing baselines for scaled-up crediting programs under Article 6 of the Paris Agreement, focusing on quantifying greenhouse gas (GHG) reductions while maintaining environmental integrity.

This research paper, published by the Stockholm Environment Institute on behalf of the German Environment Agency, provides a comparative analysis of the market mechanisms established under the Kyoto Protocol and the new provisions introduced in Article 6 of the Paris Agreement. It examines the differences in purpose, governance, and accounting between the two frameworks to identify lessons for the operationalization of the Paris Agreement's cooperative approaches and crediting mechanisms.

This policy brief by the Stockholm Environment Institute examines the environmental integrity of international market mechanisms under Article 6 of the Paris Agreement. It defines environmental integrity as ensuring that the transfer of emission units does not result in higher global emissions than if Nationally Determined Contributions (NDCs) were achieved through domestic action alone. Drawing on lessons from the Kyoto Protocol's mechanisms—the Clean Development Mechanism (CDM), Joint Implementation (JI), and international emissions trading (IET)—the brief identifies critical factors for success: the ambition of NDCs, incentives for future mitigation, the integrity of units, and robust accounting to prevent double counting.

This policy brief by the Stockholm Environment Institute evaluates the environmental integrity of Joint Implementation (JI) during the Kyoto Protocol's first commitment period (2008–2012). The analysis finds that JI likely increased global greenhouse gas emissions by approximately 600 million tCO2e due to widespread issues with additionality, overcrediting, and a lack of international oversight under 'Track 1' procedures.

This research paper by the Stockholm Environment Institute evaluates the environmental integrity of Joint Implementation (JI) during the first commitment period of the Kyoto Protocol. The authors conclude that approximately three-quarters of JI offsets likely did not represent additional emissions reductions, potentially increasing global greenhouse gas emissions by 600 million tonnes of CO2 equivalent.

This report by the World Resources Institute argues that current carbon credit markets systematically undervalue tropical forests by focusing exclusively on carbon sequestration and ignoring critical non-carbon biophysical effects that contribute to global, regional, and local climate cooling.