The air quality in several Bulgarian cities, including Pernik, Sofia, Plovdiv, Stara Zagora, Veliko Tarnovo, Ruse, Vidin, Dimitrovgrad, and Shumen, has been reported as poor, according to data from ...

WORK has begun near the city of Pirot in Serbia on the project to upgrade the 86km of railway between Niš and Dimitrovgrad close to the border with Bulgaria, the only section of Pan-European Railway ...