I once read a fantastic article about the confirmation bias (sorry, I don’t have the link). The confirmation bias is the explanation given to the way we see the world, what we read, who we hang out with and what we believe. People hunt out information that backs up their beliefs, people enjoy articles that confirms what they already thought. If you support a certain belief, you will read about that belief, if you had confidence in Obama, you would buy a book that says how great Obama is.
So for me, I am very keen on environmental issues and am very happy when I come across articles that back up my beliefs. Seeing an article saying how solar panels are becoming cheaper and are a good source of energy, reaffirms my beliefs and is all a part of my confirmation bias.
Having said this though, it can be very interesting and expanding to look for contradictory articles. Today I spent some time reading articles that completely went against my beliefs. It is initially difficult to take the articles seriously, it also can trigger a reaction, but in hindsight I feel it offers balance and an alternative viewpoint.