Europe: A Natural History
Europe is home to more than 700 million people, most of them city dwellers. Much of its wildlife has suffered as a result, but efforts are underway to protect and reintroduce some species. Others have exploited new opportunities offered by man-made environments. In Rome, the first metropolis on the continent, winter tourists watch swirling clouds of starlings flocking over the city. Buildings and structures have replaced caves and cliffs as preferred perches and nest sites for some birds, including kestrels and white storks. On a nearby landfill site, griffon vultures and red foxes forage and scavenge food. Wildlife and people are coming into contact more often. Joggers in the woods around Budapest often encounter wild boars, while farmers in the Carpathian Mountains live alongside Europe's biggest populations of bear, wolf and lynx. These predators were hunted to extinction in Western Europe, but are now returning, aided by green corridors such as the European Green Belt and wildlife-friendly development. Beavers have also returned in large numbers due to protection and the clean-up of Europe's polluted rivers. A chemical spill in the 1960s killed all the fish in the Rhine, but now there is a project to reintroduce Atlantic salmon to the river. There are, however, new dangers. Invasive species such as Chinese mitten crabs, Asian long-horned beetles and Japanese knotweed threaten the native flora and fauna. Climate change could also have a dramatic effect on the continent, but Europe's natural history has experienced many such changes in the past.
Immigration to Europe
Since 2000, Spain has absorbed around six million immigrants, adding 12% to its population. The total immigrant population of the country now exceeds 5,730,677 (12.2% of the total population). According to residence permit data for 2011, more than 710,000 were Moroccan, another 410,000 were Ecuadorian, 300,000 were Colombian, 230,000 were Bolivian and 150,000 were Chinese; from the EU around 800,000 were Romanian, 370,000 (though estimates place the true figure significantly higher, ranging from 700,000 to more than 1,000,000) were British, 190,000 were German, 170,000 were Italian and 160,000 were Bulgarian. A 2005 regularisation programme increased the legal immigrant population by 700,000 people that year. By world regions, in 2006 there were around 2,300,000 from the EU-27, 1,600,000 from South America, 1,000,000 from Africa, 300,000 from Asia, 200,000 from Central America & Caribbean, 200,000 from the rest of Europe, while 50,000 from North America and 3,000 from the rest of the world.