Today , thousands of Americans are calling for a new freedom from oil -- a dangerous , dirty and vulnerable source of energy . Jonathan Powers says U.S. thirst for oil threatens its economic and national security . He says America sends billions to hostile regimes which helps fuel terrorism , insurgency . Oil constrains American foreign policy choices , he says . Powers : " The United States is the world's largest consumer of oil.
Jonathan Powers says U.S. thirst for oil threatens its economic and national security . He says America sends billions to hostile regimes which helps fuel terrorism , insurgency . Oil constrains American foreign policy choices , he says . Powers : " The United States is the world's largest consumer of oil.