Bulgaria ranks among the top four European Union countries with the sharpest increase in diesel prices , according to energy expert Tsvetomir Nikolov from the Center for the Study of Democracy. He said the country is grouped with Estonia, Luxembourg and Belgium in terms of the scale of the rise. Speaking on Nova TV, Nikolov explained that the impact of the conflict in the Middle East is expected to continue affecting fuel prices for several more months, with the pressure likely to remain at