(VOVworld) - More than one million refugees and migrants have reached Europe by sea since the start of 2015, the United Nations refugee agency (UNHCR) says. Over 80% of the 1,000,573 people arrived in Greece, with the majority landing on Lesbos island, it said. About 844,000 traveled to Greece from nearby Turkey. Most of the others - over 150,000 - crossed the Mediterranean from Libya to Italy. The migrant crisis is Europe's worst since World War Two.