Over the last decades, air pollution has become a pressing concern as the number of cars has increased. These are mostly 1990s and early 2000s diesel cars, while it is widely believed that the fuel used in Albania contains larger amounts of sulfur and lead than in the European Union. Effective 1 January 2019, the government has imposed an import ban of used vehicles made prior to 2005 in an effort to curb pollution, encourage the buying of new cars from certified domestic dealerships, and to improve overall road safety. Another source of pollution are PM10 and PM2.5 inhaled particulate matter and NO2 gases resulting from rapid growth in the construction of new buildings and expanding road infrastructure.