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Global Diesel Vehicle Exhaust Emission Standards

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With the increasing concern about air pollution and its impact on the environment and public health, countries around the world have implemented strict exhaust emission standards for diesel vehicles. In this article, we will explore the global diesel vehicle exhaust emission standards that aim to reduce harmful pollutants released into the atmosphere.

Euro Standards in Europe

In Europe, the European Union introduced the Euro emission standards for diesel vehicles. These standards set limits on various pollutants such as nitrogen oxides (NOx), particulate matter (PM), carbon monoxide (CO), and hydrocarbons (HC). The standards have evolved over time, with Euro 6 being the latest and most stringent standard, significantly reducing harmful emissions.

US EPA Standards

In the United States, the Environmental Protection Agency (EPA) sets emission standards for diesel vehicles. The EPA’s regulations focus on reducing NOx, PM, and other harmful pollutants. The most recent standard is Tier 3, which imposes strict limits on emissions from diesel engines.

China National Standards

China, with a large and rapidly growing automotive market, has also implemented its own diesel vehicle emission standards. The China National Standards (CN Standards) set limits on NOx, PM, HC, and CO emissions. China has been continuously updating its standards to align with global environmental goals.

India Bharat Stage Emission Standards

India has adopted the Bharat Stage (BS) emission standards for diesel vehicles. Similar to Euro and US standards, the BS norms focus on reducing NOx, PM, and other harmful emissions. India has been progressively moving towards more stringent BS norms to curb pollution from diesel vehicles.

Japan’s Post New Long-term Regulations

Japan has its own emission regulations for diesel vehicles known as the Post New Long-term Regulations. These regulations target reductions in NOx and PM emissions, promoting the use of advanced emission control technologies.

International Collaboration

Recognizing the global nature of air pollution, international organizations like the United Nations Economic Commission for Europe (UNECE) and the International Council on Clean Transportation (ICCT) work to harmonize emission standards and promote best practices across countries.


Global diesel vehicle exhaust emission standards play a crucial role in addressing the environmental impact of diesel vehicles. By imposing limits on harmful pollutants such as NOx, PM, CO, and HC, these standards strive to improve air quality and public health. With continuous advancements and international collaboration, the world is making significant progress in mitigating diesel vehicle emissions and moving towards a cleaner and more sustainable transportation future.