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.
Ageing of Europe
In 2006 a national programme was developed with a goal to reverse the decline by 2020. A study published shortly after in 2007 showed that the rate of population decrease had slowed: According to the study, deaths exceeded births by 1.3 times, down from 1.5 times in the previous year, thus, if the net decrease in January–August 2006 was 408,200 people, in the same period during 2007 it was 196,600. The decline continued to slow in 2008 with only half the population loss compared to 2007. The reversal continued at the same pace in 2009 as death rates continued to fall, birth rates continued to rise and net migration stayed steady at about 250,000; in 2009 Russia saw population growth for the first time in 15 years.