Public radio's popular program "This American Life" examines hydraulic fracturing, or fracking, in its latest episode.
In the episode titled "Game Changer", the show features a professor in Pennsylvania who makes a calculation "to discover that his state is sitting atop a massive reserve of natural gas—enough to revolutionize how America gets its energy. But another professor in Pennsylvania does a different calculation and reaches a troubling conclusion: that getting natural gas out of the ground poses a risk to public health. Two men, two calculations, and two very different consequences."