Poland has the highest air pollution levels among all European Union (EU) countries.
According to Polish newspaper Gazeta Wyborcza, the European Commission (EC) has sent a reminder to the Polish government that the country might face a fine of up to 1 billion Euro ($1.13 billion) if the levels continue to remain high, Xinhua reported Tuesday.
Several Polish cities did not meet EU air purity standards.
In many towns, the concentration of harmful particles in the air exceeded the standards several times.
The EC has given Poland two months to improve the situation.
Apart from Poland, 15 other EU countries are being subjected to EC proceedings for their air pollution levels.