Air pollution is one of the most serious environmental problems worldwide. Developed countries are among the main emitters of greenhouse gases, especially carbon dioxide (CO2), which has a huge impact on global warming. As the concentration of these gases increases, so does the retention of heat in the atmosphere, leading to an increase in global temperature.
To address the challenges of climate change, economic instruments such as carbon credits have been developed . These allow for more efficient management of CO2 emissions and other greenhouse gases. In this article, we explain what carbon credits are, how they work, and how they contribute to reducing global emissions.
What are carbon credits
Carbon credits are a mechanism that emerged from the Kyoto Protocol , adopted in 1997 and in force since 2005, whose main objective is the reduction of greenhouse gas emissions globally. One carbon credit represents one tonne of carbon dioxide (CO2) that has not been emitted into the atmosphere, or that has been removed through various processes, such as reforestation, the use of renewable energy, or improved energy efficiency.
Each country that has signed up to the Kyoto Protocol has an emissions limit, and if it reduces its emissions below that limit, it can sell the excess credits to another country or company that exceeds this limit. Carbon credits have thus become a financial tool within the carbon market that allows for incentives to reduce emissions.
This system has also been adopted in other agreements, such as the Paris Agreement , which reinforces the importance of a global and transparent market for offsetting emissions. Currently, there are different standards for certifying carbon credits, such as the Verified Carbon Standard (VCS) , the Gold Standard , and the Voluntary Offset Standard , all aimed at ensuring the accuracy of emissions reductions.
How Carbon Credits Work
The operation of carbon credits is based mainly on three key mechanisms that allow greenhouse gas emissions to be effectively reduced:
- ERU (Emissions Reduction Unit): Each unit of emissions reduction is equivalent to one tonne of CO2 that has been prevented from being emitted into the atmosphere thanks to more efficient technologies or specific projects between countries.
- CER (Certified Emission Reduction): Certifies the reduction of emissions based on clean development projects, in which advanced technologies are used to minimize CO2 emissions.
- RMU (Removal Unit): Related to CO2 absorption, it focuses on afforestation and reforestation projects, which increase carbon capture through photosynthesis.
The carbon credit market is divided into two main categories: the regulated market and the voluntary market . In the regulated market, companies are obligated by government regulations not to exceed established emission limits, while in the voluntary market, individuals and companies choose, on their own initiative, to purchase carbon credits to offset their carbon footprint.
The regulated market is mainly governed by the cap-and-trade emissions trading system , popular in countries such as the United States, Canada and the European Union, which sets maximum emission limits and allows companies to buy and sell credits according to their needs.
Use of pollution reduction mechanisms
Carbon credits are also a tool that facilitates the adoption of environmental policies in large cities and industries. In places where energy efficiency is high, fewer emissions are generated, meaning that these cities or industries can sell their surplus credits to other entities that need to offset their emissions. In this way, the concept of globalization helps ensure that local actions have a global impact on emissions reduction.
A clear example of these actions is the rise of renewable energies such as solar and wind energy, the implementation of which reduces the need for fossil fuels and the emissions associated with their use. Likewise, reforestation projects are essential to increase CO2 capture, especially in rural areas and areas that have been subject to deforestation.
The increase in carbon offset projects has boosted reforestation in poor and developing areas, where the social and economic benefits can be significant. Countries like Kenya, through the Vanga Blue Forest project , have promoted the exchange of carbon credits through the conservation and restoration of mangroves.
Global market and transparency in carbon credits
While the mechanisms established by the Kyoto Protocol have been fundamental in laying the groundwork for carbon credit trading, the market has evolved toward a more global and transparent approach, especially following the introduction of the Paris Agreement . This agreement, signed in 2015, is a continuation of the Kyoto Protocol and establishes a framework for each country to define its emissions reduction targets within a broader context.
Part of this approach includes creating unique registries and databases that facilitate the verification and certification of emissions reductions, ensuring that carbon credits are authentic and truly represent a decrease in the amount of greenhouse gases in the atmosphere.
Today, a variety of players are involved in the carbon market; among them, more than 70 countries have implemented some form of carbon credit market, with the European market being one of the most advanced.
Advantages and disadvantages of carbon credits
Although carbon credits are a valuable tool in the fight against climate change, their implementation is not without challenges. The main advantages of this system include:
- Incentive to reduce emissions: Companies are motivated to reduce their emissions and participate in sustainability projects because of the economic benefits associated with carbon credits.
- Promotes innovation: The development of new technologies and cleaner processes is encouraged through the use of carbon credits.
- Global impact: Carbon credits enable local actions to have a positive impact on global emissions reduction.
On the other hand, there are certain disadvantages, mainly associated with a lack of regulation in some voluntary markets, which can lead to the sale of credits that do not represent actual reductions. Furthermore, some companies could use the credits to offset emissions without actually reducing their own.
However, advances in the verification and certification of carbon credits have improved the effectiveness and transparency of the system, reinforcing its importance as a key tool in the fight against climate change.
The future of carbon credits depends largely on the effective implementation of these mechanisms at a global level and the adoption of new technologies that facilitate the reduction of emissions. As more countries and companies join the collective effort to curb climate change, the carbon market will continue to grow in importance.
Ultimately, carbon credits are a key tool to mitigate the impact of climate change and achieve a balance between global emissions and the planet's capacity to absorb greenhouse gases.