简介:Withadvancesinshaledrillingtechniquesboostingoilandgasproduction,theU.S.hasbecometheleader,firstoutpacingRussiainnaturalgasproduction,andthenbecomingin2014anetexporterandtheworld’slargestproducerofpetroleumproducts.PresidentObamadeclaredconfidentlyinJanuary’sStateoftheUnionAddressthatthecountrywas