The private, personal character that makes online social networks appealing to people looking to stay in touch with friends and family is also leading data protection advocates from around the globe to criticize the sites.
Armed with some of Europe's most wide-reaching data protection laws, critics in Germany have accused social networks and other online sites of collecting and making commercial use of personal information without members' explicit permission - as required by law.
Google and Facebook are both under investigation in Germany, as well as other countries, for their privacy and data retention practices.
Deutsche Welle looks at the actions being taken against a number of Web sites and how Germans are using the Web and social media.
Young people from around the world have gathered in Berlin for the Youth Sustainability Summit. They are discussing ways to protect the planet, but saving the environment isn't easy.
Germany's parliament has begun lengthy debate on draft legislation to find the safest possible underground site to stash waste from nuclear power stations for eons. Legislative details have already sparked ructions.