Bulgaria's Vad Invest company has opened a concrete producing plant worth over 6.0 million levs ($4.0 million/3.0 million euro) in the Black Sea port city of Burgas, Sofia-based Dnevnik daily reported on October 30, 3008.
The Black Sea is the world’s largest meromictic basin where the deep waters do not mix with the upper layers of water that get oxygen from the atmosphere...
The Black Sea is the world’s largest meromictic basin where the deep waters do not mix with the upper layers of water that get oxygen from the atmosphere. As a result, over 90% of the deeper Black Sea volume is anoxic water that lacks oxygen.
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