There is a new site, on the order of Snopes that allows you to find out if the web page you are reading is disputed by other sources and what the alternative points of view are.
As you browse, Dispute Finder looks for disputed claims. If it finds any then it highlights them. Clicking on a disputed claim brings up evidence for and against that claim found by other users of Dispute Finder. It allows you to mark new disputed claims and see what disputed claims have been marked by other users.
It is from Berkeley and beta, and somewhat biased from what I have seen so far, (You know how those damn academics are) but still might be fun to try. One example about Global Warming being a scam - it offers government data that shows the Earth's average surface temperature has increased by about 1.2 to 1.4ºF in the last 100 years. Take off your clothes, another thousand years or so and this place will be about eleven degrees hotter. For those that use Firefox, there is a Dispute Finder extension. I use it and it seems stable.