In the United States, shale gas rose from less than 1% of domestic gas production in 2000 to over 20% by 2010. It is projected that it will account for 46% of United States gas supply by 2035. It has revolutionized the US economy by creating 600,000 direct and indirect jobs and contributed $49 billion annually to government revenues. With only a handful of well rigs (72 in Europe compared to over ...