There are huge stores of nonferrous metals (copper, lead, and zinc) in the Rhodope, Balkan, and Sredna mountains.
ມີຫ້າງໃຫຍ່ຂອງໂລຫະທີ່ບໍ່ປອດໄພ (ທອງແດງ, ກົ່ວ, ແລະສັງກະສີ) ຢູ່ໃນພູ Rhodope, Balkan, ແລະ Sredna.