The issue of automobile carbon emissions has always been a crucial aspect of global environmental governance.

As the number of cars continues to increase, the impact of car carbon emissions on the environment has become increasingly significant.

However, determining the appropriate proportion of vehicle carbon emissions in total emissions is a complex and challenging issue.

First, we need to understand the current status of vehicle carbon emissions. According to statistics, carbon emissions in the transportation sector account for about 24% of total global carbon emissions, of which road transportation makes up the vast majority.

Specifically, personal cars and cargo trucks are responsible for the majority of carbon emissions within the transportation sector. Automobile carbon emissions include not only carbon dioxide but also other greenhouse gases such as methane and nitrous oxide.

These gases not only contribute to global warming but also cause other negative impacts on the atmospheric environment, such as smog and acid rain.

Before discussing the appropriate proportion of automobile carbon emissions in total emissions, it is essential to consider the impact of these emissions on the environment and human health. Greenhouse gas emissions from automobiles are one of the main drivers of global warming.

Frequent extreme weather events, rising sea levels, and declining biodiversity caused by climate change have posed serious threats to global ecosystems and human society.

In addition, particulate matter and harmful gases in vehicle exhaust can cause air pollution, leading to a series of respiratory and cardiovascular diseases, which pose a direct threat to human health. Therefore, from the perspective of environmental protection and health, reducing automobile carbon emissions is particularly urgent.

To manage and control automobile carbon emissions, countries around the world have adopted a series of policy measures. The first is to set strict emission standards. Many countries have set emission caps on new cars and regularly update and strengthen these standards.

Europe's Euro 6 standard and the United States' Tier 3 standard are typical examples. The second measure is the promotion of new energy vehicles. Electric vehicles and hydrogen fuel cell vehicles have received strong government support as zero-emission or low-emission vehicles.

Many countries also provide subsidies and tax incentives to consumers who purchase new energy vehicles to encourage green travel. Additionally, developing public transportation systems is another important way to reduce automobile carbon emissions.

By improving the accessibility and coverage of public transport, private car use can be reduced, thereby lowering overall carbon emissions.

However, despite these efforts, there are still many challenges in completely solving the problem of automobile carbon emissions. The first challenge is the technical bottleneck.

Although new energy vehicle technology continues to advance, there are still many problems regarding cruising range, charging speed, and infrastructure construction.

Secondly, there is the issue of cost. The current cost of new energy vehicles remains high, posing a significant burden for ordinary consumers.

Furthermore, the existing transportation structure and mode are difficult to change fundamentally in a short period, and society needs a long-term adaptation and adjustment process.

In the future, more comprehensive and sustainable measures are needed to address vehicle carbon emissions. The first step is to increase scientific and technological research and development efforts to improve the performance and economy of new energy vehicles.

Governments and enterprises can promote technological innovation and industrial upgrading through cooperation. The next step is to enhance international collaboration. Climate change is a global problem, and the efforts of one country alone are insufficient.

Countries should jointly formulate and implement global carbon emission reduction targets and action plans, share technology and experience, and work together to address challenges. In addition, the public’s environmental awareness and behavior also need to be improved.

Through education and publicity, the public can be guided to choose green travel methods, such as cycling, walking, or using public transportation, thereby reducing the frequency of private car use.

Determining the appropriate proportion of vehicle carbon emissions in total emissions is a complex system engineering problem.

Through long-term and unremitting efforts, we can gradually reduce the impact of automobile carbon emissions on the environment and health. Only in this way can we achieve the goal of sustainable development and create a clean and healthy Earth for future generations.