The number of online adults who have used online classified ads has more than doubled in the past four years. Almost half of internet users say they have ever used online classified sites, compared with 22% of online adults who had done so in 2005. And, on any given day about a tenth of internet users (9%) visit online classified sites, up from 4% in 2005, according to Pew Research Center's Internet & American Life Project.

Free television and the Internet, currently represent the media mix consumers use most for gathering news and background information. Nevertheless, while television and 'free' Internet were independently the most popular media, newspapers were given a comparable ranking to each of them if free and paid-for titles are combined, according to PricewaterhouseCoopers.

U.S. laboratories lead the world in green energy and environmental research expertise, and Germany & China are not far behind. The study by Elsevier of 3,000 research institutions and universities which ranked by areas of expertise, NASA's Goddard Space Flight Center in Greenbelt, Maryland, tops the list in alternative energy, such as solar cells, and environmental science from 2003 to 2007.

Of the 17 European countries individually tracked in April 2009, Germany’s online audience was the continent’s largest, racking up 40 million unique visitors during the month. In terms of unique visitors, The UK (36.8 million visitors), and France (36.3 million visitors) had the second and third-largest online audiences. Russia and Italy rounded out the top five, according to data from comScore.