Shale gas, the energy source which has shaken up world oil markets, could soon be flowing in Poland after changes in government policy. Shale gas drilling has a chequered history in Poland. International oil giant Exxon Mobil tried to extract the controversial energy source in the country and gave up in 2012. Instead, Poland’s first shale gas extraction will start within months, or even weeks, according to Dennis McKee, chief executive of United Oilfield Services, which is providing equipment for shale gas exploration in Poland. ( Read more: Poland: A tough sell for investors? ) “The climate is changing quickly at this point, and there are more wells this year than in the last five years,” he told CNBC. “Government plans have changed, making it easier to develop.” Shale gas, the energy source which has shaken up world oil markets, could soon be flowing in Poland after changes in […]