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WHERE IN BULGARIA ARE YOU? © Anthony Georgieff

Sometimes (but not every year) in May-June the Black Sea turns… green. Not just the greenish colour that large masses of water sometimes assumes, but a bright, almost ethereal bluish-green that mesmerises. What is going on?

The answer is simple and very much down-to-earth or, in this case, down to what's in the water. No, it is not pollution. It is the phytoplankton, a kind of migrating seaweed, that always lives in the Black Sea but that develops particularly rapidly at that time of the year.

Where in Bulgaria are you?

Email your answers to This email address is being protected from spambots. You need JavaScript enabled to view it. and you can win a copy of Hidden Treasures of Bulgaria 2


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