These days, there is an issue in my country caused by fine dust. If there are many factories or cars near the city, the possibility of fine dust and ultrafine dust will increase. People often use air cleaners or masks for their health. It is better to use electric cars instead of fossil fuels to lower the city's fine dust levels. Now electric cars are applied to trucks and buses as well as regular cars. Electric cars are pleasant because they have little noise and vibration. I also think that in the near future, all buses should be converted into electric cars because they don't emit fine dust.