Social Networking is on the Rise and sites like Twitter and Facebook are growing at the speed of light. But yes as we know every bit of Good surely has some bad part.
A reasearch Suggests that these social networking website are Increasing the Risk of Cancer. If the question is how, then the answer is this that People nowadays are interacting with other people via the internet and therby reducing offline meetups and so if there is no Offline interacting this may increase the risk of Cancer. This may be shocking for many of the users but yes, this is true.