The Holocaust in Belgium the country before World War I. The interwar period saw substantial Jewish immigration to Belgium. By 1930, the population rose to 50,000, and by 1940 it was between 70,000–75,000. Most of the new Jewish immigrants came from Eastern Europe and Nazi Germany, escaping anti-Semitism and poverty in their native countries. The Roma population of Belgium at the same time was approximately 530. Few of the Jewish migrants claimed Belgian citizenship, and many did not speak French or Dutch. Jewish communities developed in Charleroi, Liège, Brussels and, above all, Antwerp, where more than half of the Jews in Belgium lived. The
Belgium Fund for Nature, the territory of Belgium belongs to the ecoregion of Atlantic mixed forests. Because of its high population density, industrialization and its location in the centre of Western Europe, Belgium still faces some environmental problems. However, due to consistent efforts by the various levels of government in Belgium, the state of the environment in Belgium is gradually improving. This led to Belgium being ranked as one of the top 10 countries (9 out of 132) in terms of environmental protection trends, and to Belgium being ranked in 2012 as the 24th country out of 132 for environmental protection.