The total investment in the project, which will upgrade the public transport of Sliven municipality, amounts to 13.2 million levs, the ministry said in a statement earlier this week.
The new will replace eleven of the oldest diesel buses and trolleybuses in the municipality, thus reducing nitrogen oxide emissions by 3.41 tonnes per year and fine particulate matter levels by 0.17 tonnes per year.
The delivery of the vehicles is planned to be completed within 39 months.
(1 euro = 1.95583 levs)