'(Cheryl of the Clue Crew at an oil rig near Oklahoma City)  Once a derrick has drilled, what you see in an oil field is a pumpjack, bringing up mainly oil & this fuel'
natural gas
ENERGY: Once a derrick has drilled, what you see in an oil field is a pumpjack, bringing up mainly oil & this fuel
Once a derrick has drilled, what you see in an oil field is a pumpjack, bringing up mainly oil & this fuel
Once a derrick has drilled, what you see in an oil field is a pumpjack, bringing up mainly oil & this fuel
ENERGY
natural gas
ENERGY