Scientists report that the Black Sea has changed color dramatically. Until recently, it had a dark blue color on space images, and now the color has turned emerald green. The largest color changes occur off the coast of Bulgaria and Romania (Danube Delta). RBC-Ukraine tells what happened to the water in the Black Sea and what it threatens to do, citing a report by Radio Varna. In May, the color of the Black Sea began to change, and according to scientists, this was due to the massive reproduction of phytoplankton. Now, in the images from space, it is not dark blue, but emerald green. Changes h…