WNYC, in a joint investigation with ProPublica, a non-profit investigative news organization, recently discovered that New York State legislators have been aggressively promoting the exploration of natural gas in New York's Macellus Shale, a type of gas-rich sediment. WNYC reporter Ilya Marritz, who investigated the practice, and ProPublica reporter Abrahm Lustgarten discuss the environmental controversies of natural gas exploration.