2 . In today's world, online social media' has become more powerful and the most destructive thing over worldwide, although with time all generations have come to accept the changes social network has brought about, teenagers and young adults are the most enthusiastic users of these sites. According to various research studies in the field of online social networks, it has been revealed that these sites are impacting the' lives of the youth greatly. When using these sites such as Twitter, Facebook or Myspace, there are both positive and negative effects on the youth.

Firstly, social media helps the youth and any other user updated with what is happening around the world, and helps the teenagers stay connected and interact with each other even if they are many miles apart. This strengthens their relationship. Even if they finished school and moved to different locations, they stay connected and update one another.

In addition, social media sites have provided a platform whereby the youth can create groups and pages based on their common discipline and end up building connections and opportunities for their respective careers by updating different topics to discuss. Youth who have been interviewed say that social media has become their lifestyle and it makes their lives easier and more efficient.

While on the one hand social network sites seem to bring people together and stay connected, on the other hand it causes many physical and mental health problems such as eyes infection, back problems, etc. Other negative effects of social networking various people suggested included encouraging poor spelling and grammar, exposing underage to online predators (捕食者), allowing spread of misinformation that is seen as fact, decreasing productivity as those who are supposed to be working spend time in the sites to chat, providing a perfect platform for cyberbullying and providing details that increase risks of identity theft.

“The more social media we have, the more we think were connecting, yet we are really disconnecting from each other.” One researcher said.

In conclusion, social networking clearly portrays both positive and negative effects on the youth. It is the decision of individuals whether to use it in a right way or wrong.

3 . Like a tired marriage, the relationship between libraries and publishers has long been dull. E-books, however, are causing heartache. Libraries know they need digital wares, but many publishers are too cautious about piracy(盗版)and lost sales to co-operate. Among the big six, only Random House and Harper Collins license e-books with most libraries.

Publishers are wise to be nervous. Owners of E-readers are exactly the customers they need: book-lovers with money. If these people switch to borrowing c-books instead of buying them, what then? Electronic borrowing is awfully convenient. Unlike printed hooks, which must be checked out and returned to a physical library miles from where you live, book files can be downloaded at home. The tiles disappear from the device when they are due.

E-lending is not simple, however. There are lots of different and often incompatible(不兼容的)e-book formats, devices and licenses. Most libraries use a company called OverDrive, which secures rights from publishers and provides E-books and audio files in every format. Yet publishers and libraries are worried by OverDrive's global market dominance, as the company can control fees and conditions. Publishers were annoyed when OverDrive cooperated with Amazon, the world's biggest online bookseller, last year. Owners of Amazon's Kindle E-reader who want to borrow E-books from libraries are now redirected to Amazon's website, where they must use their Amazon accounts to secure a loan.

According to Pew, an opinion researcher, library users are perfect for market for Amazon. Late last year Amazon Introduced its Kindle Owners' Lending Library, which lets its best customers borrow free one of thousands of popular books each month.

Library supporters argue that book borrowers are also book buyers and that libraries are vital spaces for readers to discover new work. Many were cheered by a recent Pew survey, which found that more than half of Americans with library-cards say they prefer to buy their e-books.