According to the city government, 79 percent of air pollution in Seoul is influenced by factors outside of Seoul and Korea. But within the city, it says, 35 percent of air pollution is caused by vehicles. Seoul said it will crack down on the 113,000 diesel vehicles weighing more than 2.5 tons which were registered before 2005. From 2017 onward, the city government will ask the vehicles’ owners to scrap the cars or install them with pollution reduction devices.
Furthermore, the city will restrict these old diesel vehicles from entering Seoul and the capital areas and anyone who violates the regulations twice will be fined up to 2 million won ($1,760).