Pennsylvania has filed charges against Exxon unit XTO Energy. Pictured, an XTO operation in the state. Corbis Exxon Mobil Corp. is fighting criminal charges over a wastewater spill in Pennsylvania with an unusual defense, contending that the state’s attorney general improperly singled the company out in an effort to stop hydraulic fracturing. Attorney General Kathleen Kane fired back on Wednesday in a court filing that calls the company’s claims “nothing more than weak attempts to obfuscate the truth.” Prosecutors say Exxon subsidiary XTO Energy Inc. is criminally liable for a big leak of water that had been used in fracking in north-central Pennsylvania in 2010. The case involves the first criminal charges filed against a public company drilling in Pennsylvania’s Marcellus Shale. A spokeswoman for the attorney general said the state has convicted more than 800 individuals and companies of environmental crimes. “No single industry has been targeted,” said […]