In most cases, pulmonary embolism is caused by a blood clot in the leg that breaks loose and travels to the lungs. A blood clot in a vein close to the skin is not likely to cause problems. But having blood clots in deep veins (deep vein thrombosis) can lead to pulmonary embolism.
St. Petersburg. 1  St. Petersburg is a city with a long and eventful history. 2  Altai is perhaps the most beautiful region of Russia. 3  Moscow is the capital of Russia, as well as the nationâs epicentre of arts, music, science, academics, and politics.  For a step back in time, Olkhon Island is a wonderful place to visit.
But now, with the devaluation of ruble, Saint Petersburg became much more affordable for both living in and travelling. By the way, Moscow held the 4th place in the same rating, after Tokyo (Japan), Luanda (Angola) and Osaka (Japan), and so it was the city with the highest cost of living in Europe.