A large drilling rig sits outside the Covelli Center with some of the Youngstown, Ohio skyline in the background. Officials say drilling in Ohio’s Utica shale region nearly doubled the output of oil and natural gas there since 2011, although some industry experts remain cautious about the long-term potential for production. (AP Photo/Mark Stahl, File) by Kevin Begos PITTSBURGH (AP) — The head of an influential charity is being criticized for his ties to the oil and gas industry, but some experts say the allegations are misguided. The Public Accountability Initiative, a liberal-leaning group that investigates corporations and businesses, released a report last week claiming that Robert Vagt, the president of Pittsburgh-based Heinz Endowments, hadn’t fully disclosed his ties to the oil and gas industry and his current membership on the board of Houston-based Kinder Morgan Inc., the largest operator of natural gas pipelines in the U.S. The report also criticized the Endowments, which are separate from the giant food company, for providing funding for the Center for Sustainable Shale Development, which works with the gas drilling industry to reduce pollution.