Greenwire: An oil and gas group is protesting the nomination of critics of hydraulic fracturing to serve on a panel that will peer review a U.S. EPA study of the drilling practice. The Independent Petroleum Association of America sent a letter (pdf) to EPA today highlighting two critics on the list of 82 potential panelists. “Unfortunately, a number of nominees’ past comments betray a strong and unambiguous antipathy toward shale development in general, and hydraulic fracturing in …