Why the United States and Iran Remain the Only Major Emitters Without a Net-Zero Target
The United States and Iran are the only major greenhouse gas emitting countries without an official carbon neutrality commitment. This observation raises crucial questions about the global trajectory to limit global warming. Explanations and implications according to Carbon Brief.
The United States and Iran stand out as the only major global emitters not to have set an official carbon neutrality, or net-zero, target. This lack of commitment is particularly striking as the majority of countries, including the largest polluters, have now incorporated a net-zero emissions target into their climate policies for the medium or long term.
A clear finding: only two major emitters without a net-zero target
According to a recent analysis by Carbon Brief, while more than 130 countries have formally adopted carbon neutrality targets, the United States and Iran are not among them. These two countries are among the largest global greenhouse gas emitters. Their absence of net-zero targets means they have not committed to balancing their CO2 and other gas emissions by a given horizon, which contrasts with the global trend towards decarbonization.
Setting a carbon neutrality target relies on a predictive model combining historical emissions data, economic projections, and technological evolution scenarios. Governments often base their decisions on scientific analyses and international commitments such as the Paris Agreement to define a deadline (often 2050) by which their net emissions must be zero. This involves detailed plans integrating renewable energy, energy efficiency, and sometimes carbon offsetting.
Why do these two countries not commit?
Several factors explain this exception. For the United States, despite commitments made under certain administrations, the absence of a binding federal framework in the long term makes it difficult to politically stabilize an official net-zero target. As for Iran, geopolitical and economic constraints, along with a strong dependence on hydrocarbons, hinder the adoption of a clear strategy towards carbon neutrality.
Since the signing of the Paris Agreement in 2015, the international community has multiplied initiatives to set greenhouse gas emission reduction targets. Most of the world's major economies have gradually adopted ambitious plans aiming for carbon neutrality by 2050, aligning with a collective logic to limit global warming. This movement has been strengthened by the rise of renewable energies and growing pressure from citizens and businesses. In this context, the choice of the United States and Iran not to formalize such targets marks a notable break, raising questions about the underlying political and economic motivations.
Tactical and diplomatic stakes related to the lack of commitment
The absence of carbon neutrality targets in these two countries is not only due to internal hesitation but is part of a complex diplomatic game. The United States, for example, has experienced significant fluctuations in its climate policy depending on the administration in power, which has weakened the continuity of commitments. For Iran, economic sanctions and international tensions limit the financial and technical capacities to engage in an ambitious energy transition. These factors make international cooperation difficult, even though their participation is crucial for a coherent global climate strategy. Moreover, this situation intensifies debates around historical emissions responsibility and aid mechanisms for developing countries.
Impact on the global ranking of emitting countries and future prospects
In terms of total emissions, the United States and Iran hold major positions on the global stage. Their lack of net-zero targets not only compromises global climate goals but also influences the ranking of countries most committed to fighting climate change. In the medium term, if these two nations do not change their stance, they risk being isolated in international negotiations, which could affect their economic and diplomatic relations. However, several experts believe that internal and external pressures, notably through financial markets and trade agreements, could encourage them to revise their strategy. International dialogue therefore remains an essential lever to promote positive change.
Consequences for the global climate fight
The fact that these two heavyweights have no net-zero targets complicates the collective trajectory towards limiting warming to +1.5°C or +2°C. Indeed, their emissions represent a significant share of the global total, and without a clear plan, the risk is that efforts by other countries will be partially offset. This situation also highlights the importance of integrating these countries into international incentive and climate cooperation mechanisms.
An increased urgency for coordinated global action
This Carbon Brief analysis reminds us that the fight against climate change cannot be effective without universal and binding commitments from the main emitters. The United States and Iran, due to their weight in global emissions, play a key role. Their lack of net-zero targets calls for rethinking diplomatic and economic strategies to fully integrate them into the global decarbonization dynamic.
In summary
While more than 130 countries have adopted carbon neutrality targets, the United States and Iran remain isolated among major emitters due to their lack of official commitment. This situation results from complex political, economic, and geopolitical factors that hinder their energy transition. Their position impacts the global momentum in the fight against climate change, underscoring the importance of strengthened international cooperation. To effectively limit global warming, it is crucial that these powers revise their strategies and fully engage in collective decarbonization efforts.
