Ads on Google have placed pro-fracking propaganda at the top of Google search results and into the middle of an important discussion on the environmental impacts of fracking. The practice raises important questions about the role of search engines in the new media world.

For more than 17 months, Robert Howarth, an ecology professor at Cornell, has had a Google problem. Howarth is the chief author of an important paper on the environmental impact of hydraulic fracturing, or fracking, a controversial method of obtaining natural gas. The paper concludes that the practice is not a clean way to extract domestic energy, as many allege, and has an even greater carbon footprint than coal. The paper's conclusions poke holes in some of the most common talking points used by supporters of fracking and made major headlines, including a large and prominently placed article in The New York Times in April 2011. Howarth, along with one of his co-authors, Anthony Ingraffea, and activist actor Mark Ruffalo, were ranked by Time as among the 100 "people who matter" in 2011.