In this June 25, 2012 photo, a crew works on a drilling rig at a well site for shale-based natural gas in Zelienople, Pa. A new fee on gas drilling has generated millions of dollars more in revenue ... more 
In this June 25, 2012 photo, a crew works on a drilling rig at a well site for shale-based natural gas in Zelienople, Pa. A new fee on gas drilling has generated millions of dollars more in revenue than first projected, but other major gas-producing states tax the industry at higher rates, according to an Associated Press analysis, released Saturday, Sept. 15, 2012. (AP Photo/Keith Srakocic) less 
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Associated Press | Photo By Keith Srakocic
Sat, Sep 15, 2012 8:55 PM EDT