The United Nations Climate Change Conference, known as COP26, in Glasgow, Scotland catalyzed a commitment to carbon neutrality, achieving net-zero carbon emissions, requiring reducing emissions as much as possible, and balancing the remaining emissions with the purchase of carbon credits.
A carbon credit reduces, avoids or removes carbon emissions in one place to compensate for unavoidable emissions somewhere else through certified green-energy projects. Carbon credits represent one ton in carbon emission reduction. They are 1) Avoidance or reduction projects — e.g., renewable energy (wind, solar, hydro, biogas) — and 2) Removal or sequestration — e.g., reforestation and direct carbon capture, which are aimed at the voluntary carbon market (VCM). Carbon credits can be resold multiple times until it has been retired by the end-user who wants to claim the offset’s impact. Carbon credits can also have co-benefits, such as job creation, water conservation, flood prevention and preservation of biodiversity.
Carbon registries store the carbon credits issued by third-party independent and internationally certified auditors or verifiers, in accordance with independent standards. Serial-numbered credits are issued by the verifiers, and the offset reduction claim gets converted to carbon credits that can be traded or retired. Carbon markets turn CO2 emissions into a commodity or tradable environmental asset by giving it a price.
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In the compliance market, carbon allowances are traded. There are currently 64 compliance markets in the world, and pricing is determined by the emitters and polluters. The European Union carbon market or Emissions Trading System (ETS), is the largest carbon market, with a 90% share in the global trade. Entry into the EU ETS is restricted to large polluters only and their brokers that are regulated by the operators of the program. The supply of credits is also controlled to manage the pricing. Only the carbon prices traded in the EU ETS reflect the true cost to pollute carbon, but access to the market is not equitable.
Small companies and individuals can only access the voluntary carbon market, where they buy credits at their own discretion to offset emissions from a specific activity. Voluntary credits usually cannot be traded under the compliance market regime. Voluntary carbon markets are expected to grow 15-fold by 2030 to respond to increased private sector demand for climate solutions, according to the “Taskforce for Scaling the Voluntary Carbon Market Final Report January 2021.” A significant problem with VCMs is that carbon credit prices have been low. The low costs of voluntary credits at $2–$3 per credit neither motivate nor incentivize project developers and do little to capture the true cost of climate pollution as compared to the compliance markets.
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An excellent article for understanding VCM is “The Good Is Never Perfect: Why the Current Flaws of Voluntary Carbon Markets Are Services, Not Barriers to Successful Climate Change Action.” In this article, Oliver Miltenberger, Christophe Jospe and James Pittman highlight key issues around the design, function and the scale-up of VCMs.
Greenwashing. This happens when companies with false energy efficiencies claim to be more environmentally friendly than they really are, and thus high rates of ineffective credits are used to offset corporate emissions.
Carbon accounting. The number of claims for offsetting emissions is unrealistic, given ecosystem constraints. Net-zero ambitions should have disclosure requirements and be audited. Double-counting can happen intentionally but also occurs due to a lack of complete accounting protocols and a lack of alignment between market jurisdictions or operators.
Market failures and inefficiencies. One major critique emphasizes the risk to unfairly…
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