To have fewer greenhouse gases plaguing our world has become a key priority for different countries and organizations to work on every day. The Emission Trading System (ETS) is a good tool to use in this market-based approach since companies will be more eager to cut emissions if they have economic incentives in place. Again, although there are different ETS designs and goals within the systems, they all aim for a common target: reducing carbon emissions while still ensuring economic efficiency.

Types of Emission Trading System

There are two types of emission trading systems: one where greenhouse gases cannot be exceeded (cap-and-trade), and another type in which other standards set limits for how much a company can emit. Both work using different principles, serving different regulatory needs and environmental goals. Let’s now take a moment to review and discuss this information with some specific examples so that we can understand how it works.

Cap-and-Trade Systems

The most recognized model of an emissions trading system is cap-and-trade. It is built on a simple and robust principle: placing a cap or limit on the total amount of greenhouse gases emitted by all entities within the jurisdictions participating in the system.

• Emission Allowances: Each company is allotted or purchases a certain number of allowances. A company is allowed to emit 1 tonne of CO₂ equivalent each time an allowance is used up.
• Trading Flexibility: Companies that effectively reduce their emissions below the prescribed limit can sell these extra greenhouse gas permits to other companies. This gives businesses a financial stake in cleaning up their operations and implementing energy-saving processes without excessive regulations on new equipment.
• Market Forces: Market forces mean that the market price of permits is decided by the buy-and-sell game. When there is high demand, permit prices rise, forcing companies to seek cheaper ways of cutting emissions.

One example is the European Union Emission Trading System, considered the world’s largest and oldest cap-and-trade scheme. Emissions from European heavy industries, power generation, and gradually also the aviation sector fall under the EU ETS, with their ceiling dropping year after year to guarantee long-term emissions reduction.

Baseline-and-Credit Systems

However, unlike cap-and-trade, the baseline-and-credit system does not fix an upper limit on cumulative emissions. Instead, it provides rewards to selected enterprises.

Key Features of Baseline-and-Credit Systems

• No Total Cap: Contrary to cap-and-trade, there is no upper limit to total emissions. If a business has enough credits and wants to continue polluting, it can carry on emitting greenhouse gases as long as it has credits.
• Offset Mechanism: Companies that exceed the required emissions reductions sell credits to others who fall short of their baseline. These credits must be backed by genuine reductions verified from the past business year.
• Flexibility in Compliance: Flexibility in compliance allows companies to buy or sell credits, reducing the direct burden of responsibility.

Baseline-and-credit systems are often used in industries or countries where it is not possible to set an upper limit on emissions. This may be due to extensive industrialization, varying economic stages, or developing living standards.

Also Read: Carbon Trading Policy

Other Types of Emission Trading Systems

The structure of an emission trading system determines how it is classified, with the main types falling within this category.

Compliance Markets

Compliance markets are mandatory systems where companies are legally required to achieve emission reduction targets regardless of cost. They are usually associated with cap-and-trade systems, in which governments impose hard limits on emissions to ensure compliance. For example, businesses covered by the EU ETS must observe the regulatory caps or suffer penalties.

Voluntary Markets

Governments do not regulate voluntary markets, but they allow companies to meet self-imposed sustainability objectives. Companies buy offsets, such as planting trees or financing renewable energy projects, to demonstrate their efforts in reducing carbon footprints. Even though these voluntary markets lack enforcement, they still serve as a key driver of corporate social responsibility and climate action.

Also Read: India Set To Launch Its Own Carbon Credit Trading Market

Choosing the Right System

Both cap-and-trade systems and baseline-and-credit systems have advantages and disadvantages.

Cap-and-trade is better suited for large-scale programs because it guarantees that once a total emission level is set, any further reduction is an added benefit. However, it imposes significant costs on companies in high-emission industries.

Baseline-and-credit systems, however, offer more flexibility and can foster innovation by incentivizing past reductions. However, they do not enforce an overall cap on emissions, which can slow the rate of overall emission reductions.

In Conclusion

The Emission Trading System (ETS) is a powerful tool in the fight against climate change, offering a market-based mechanism to lower greenhouse gases. Whereas cap-and-trade systems set hard caps on total emissions, baseline-and-credit systems incentivize companies that exceed their reduction targets. These systems, combined with compliance and voluntary markets, help businesses balance economic growth while promoting environmental sustainability.

Having a better understanding of these different types of ETS will help policymakers, businesses, and individuals evaluate how to best leverage these systems for a sustainable future.

Also Read: Global Perspectives On Carbon Tax: Success Stories And Challenges