As the wave of net-zero emission sweeps over the globe, an increasing number of multinational and large-sized local companies are pledging to achieve carbon neutral. However, businesses may experience difficulties, such as lack of renewable energy generation or process equipment that is too complicated and expensive to be fully replaced in the short term. Therefore, carbon credits (carbon offsets) have become a common approach to offsetting one's own carbon emissions under the time pressure to meet the target. Given their wide variety worldwide, carbon credits vary greatly in terms of methodology, pricing, as well as the types required for different markets and application scenarios. Therefore, companies need to assess carefully whether the carbon credits in which they intend to invest are eligible for future offsets.
 

Types of carbon credit

There are two types of carbon credits based on their sources: mandatory and voluntary. Ｍandatory carbon credits, also known as allowances, are issued by governments under a emissions cap-and-trade regulatory program, such as the EU Emissions Trading Scheme (EU-ETS). Under the system, a government sets a cap on greenhouse gas emissions and issues allowances to regulated companies, which can sell and buy credits to meet their targets. Most of the companies participating in the mandatory market belong to heavy industry and are therefore often the priority targets for regulation, such as the cement industry and steel industry.

Figure 1. Mandatory market operation

Voluntary carbon credits, on the other hand, are traded to certify the effectiveness of emissions reductions. Many companies are currently facing a situation where the national government has yet to mandate carbon neutral, but they are facing (or have faced) pressure to go green in their supply chains amid the net zero trend, forcing them to enter the race against capital, time, and sustainability. This article will focus on the development of voluntary market and carbon credit acquisition to provide companies with feasible solutions.

Figure 2. Voluntary market operation

Current status of voluntary carbon credits

The Clean Development Mechanism (CDM) is the world’s first international carbon finance scheme established by the UN, the issuer of the certificate to prove emission reduction represented by the carbon credits. Unlike independent organizations, the UN's carbon credits are retired after purchase and cannot be re-transferred. As the legal source of the CDM is the Kyoto Protocol, which expired in 2020, the CDM is no longer accepting new cases. Those who already hold carbon credits will have to wait until the next Climate Change Conference to know how to operate, and the future development of the CDM also awaits for resolution.

The table below shows four carbon credits issued by independent international organizations, each with their own methodologies, namely the Verified Carbon Standard (VCS) by Verra, Climate Action Reserve (CAR), Gold Standard (GS) and American Carbon Registry (ACR). All of these are internationally recognized standards that have been adopted by many major brands.

Table 1. Comparison of international carbon credit standards