Unit
- Greenhouse gas emissions: Carbon dioxide and other GHGs trap heat in the atmosphere, causing global warming. Carbon markets aim to reduce emissions by putting a price on each ton of CO2 equivalent released, creating a financial incentive for emitters to cut pollution.
- Kyoto Protocol and Paris Agreement: The Kyoto Protocol (1997) established the first international carbon market through the Clean Development Mechanism. The Paris Agreement (2015) shifted to nationally determined contributions, driving regional compliance markets like the EU ETS and voluntary offset markets worldwide.
- Cap-and-trade systems: Regulators set an overall emissions cap for covered sectors and issue allowances equal to that cap. Emitters must surrender allowances for each ton emitted; those who reduce emissions can sell surplus allowances. This creates a market-driven price for carbon.
- Carbon tax versus cap-and-trade: A carbon tax sets a fixed price per ton, while cap-and-trade sets a fixed quantity. Both achieve emission reductions, but cap-and-trade provides price discovery through trading. Many jurisdictions combine elements, such as a price floor in the EU ETS.
- Voluntary carbon markets: Beyond compliance regimes, companies and individuals purchase carbon credits to offset their residual emissions. These markets operate under standards like Verra and Gold Standard, issuing credits from projects such as reforestation, renewable energy, and methane capture.
- Supply and demand fundamentals: Carbon credit supply comes from emission reduction projects or allowance auctions. Demand originates from regulated entities, corporate net-zero commitments, and speculative investors. Price volatility depends on policy changes, economic cycles, and project availability.
- Additionality and permanence: A carbon credit must represent emission reductions that would not have occurred without the project (additionality). Reductions must also be permanent, meaning carbon stored in forests or soils is not released back. These principles ensure market integrity and environmental effectiveness.
- Market size and growth: Global carbon markets were valued at over $800 billion in 2022, with the EU ETS accounting for the largest share. Voluntary markets grew to nearly $2 billion. Analysts project rapid expansion as more countries implement carbon pricing and corporate net-zero targets multiply.
- Project types and examples: Common carbon offset projects include reforestation, afforestation, and improved forest management, which sequester carbon. Renewable energy projects like wind and solar displace fossil fuel generation. Methane capture from landfills or livestock reduces potent emissions. Each project type has different risks and co-benefits for biodiversity and communities.
- Third-party verification: Carbon credits must be validated and verified by accredited auditors to ensure they meet standards like Verra's VCS or the Gold Standard. Verification involves reviewing project design, monitoring data, and confirming that emission reductions are real, measurable, and additional. This independent oversight builds buyer confidence and market credibility.
- Trading platforms and intermediaries: Carbon credits are traded on exchanges like Xpansiv CBL or through over-the-counter brokers. Market participants include project developers, traders, compliance buyers, and financial institutions. Some platforms offer spot trading, futures contracts, and options. Liquidity varies by credit type and vintage, with nature-based credits often traded bilaterally.
Regulatory Requirement
Regulation: Paris Agreement Article 6
Article 6 enables international transfer of mitigation outcomes, allowing countries to use carbon credits to meet their nationally determined contributions. It establishes rules for avoiding double counting and ensuring environmental integrity. Market participants must track credits through registries to comply with corresponding adjustments.
Quick Revision
- Carbon markets price emissions to reduce GHGs via cap-and-trade or voluntary offsets.
- Key drivers include the Paris Agreement, regional compliance systems, and corporate net-zero pledges.
- Credit quality depends on additionality, permanence, and third-party verification.
- The market is growing rapidly, with regulatory and voluntary segments.